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[PATCH] selftests/bpf/Makefile: fix relative rpath usage

by Eugene Syromiatnikov

The relative RPATH ("./") supplied to linker options in CFLAGS is resolved relative to current working directory and not the executable directory, which will lead in incorrect resolution when the test executable is run from elsewhere. Changing it to $ORIGIN makes it resolve relative to the directory in which the executable resides, which is supposedly the desired behaviour. Discovered by the check-rpaths script[1][2] that checks for insecure RPATH/RUNPATH[3], such as relative directories, during an attempt to package BPF selftests for later use in CI: ERROR 0004: file '/usr/libexec/kselftests/bpf/urandom_read' contains an insecure runpath '.' in [.] [1] https://github.com/rpm-software-management/rpm/blob/master/scripts/check-rp… [2] https://github.com/rpm-software-management/rpm/blob/master/scripts/check-rp… [3] https://cwe.mitre.org/data/definitions/426.html Signed-off-by: Eugene Syromiatnikov <esyr(a)redhat.com> --- tools/testing/selftests/bpf/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index dd49c1d23a60..6a3dc9b99159 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -241,7 +241,7 @@ $(OUTPUT)/urandom_read: urandom_read.c urandom_read_aux.c $(OUTPUT)/liburandom_r $(filter-out -static,$(CFLAGS) $(LDFLAGS)) $(filter %.c,$^) \ -lurandom_read $(filter-out -static,$(LDLIBS)) -L$(OUTPUT) \ -fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \ - -Wl,-rpath=. -o $@ + -Wl,-rpath=\$$ORIGIN/ -o $@ $(OUTPUT)/sign-file: ../../../../scripts/sign-file.c $(call msg,SIGN-FILE,,$@) -- 2.28.0

1 year

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[PATCH] selftests/sched/Makefile: remove relative rpath usage

by Eugene Syromiatnikov

The relative RPATH ("./") supplied to linker options in CFLAGS is resolved relative to current working directory and not the executable directory, which will lead in incorrect resolution when the test executables are run from elsewhere. However, the sole sched test (cs_prctl_test) does not require any locally-built libraries to run, so the RPATH directive can be removed. Discovered by the /usr/lib/rpm/check-rpaths script[1][2] that checks for insecure RPATH/RUNPATH[3], such as containing relative directories, during an attempt to package BPF selftests for later use in CI: ERROR 0004: file '/usr/libexec/kselftests/bpf/urandom_read' contains an insecure runpath '.' in [.] [1] https://github.com/rpm-software-management/rpm/blob/master/scripts/check-rp… [2] https://github.com/rpm-software-management/rpm/blob/master/scripts/check-rp… [3] https://cwe.mitre.org/data/definitions/426.html Signed-off-by: Eugene Syromiatnikov <esyr(a)redhat.com> --- tools/testing/selftests/sched/Makefile | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/tools/testing/selftests/sched/Makefile b/tools/testing/selftests/sched/Makefile index 099ee9213557..0e4581ded9d6 100644 --- a/tools/testing/selftests/sched/Makefile +++ b/tools/testing/selftests/sched/Makefile @@ -4,8 +4,7 @@ ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) CLANG_FLAGS += -no-integrated-as endif -CFLAGS += -O2 -Wall -g -I./ $(KHDR_INCLUDES) -Wl,-rpath=./ \ - $(CLANG_FLAGS) +CFLAGS += -O2 -Wall -g -I./ $(KHDR_INCLUDES) $(CLANG_FLAGS) LDLIBS += -lpthread TEST_GEN_FILES := cs_prctl_test -- 2.28.0

1 year

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[PATCH] selftests/rseq/Makefile: fix relative rpath usage

by Eugene Syromiatnikov

The relative RPATH ("./") supplied to linker options in CFLAGS is resolved relative to current working directory and not the executable directory, which will lead in incorrect resolution when the test executables are run from elsewhere. Changing it to $ORIGIN makes it resolve relative to the directory in which the executables reside, which is supposedly the desired behaviour. Discovered by the /usr/lib/rpm/check-rpaths script[1][2] that checks for insecure RPATH/RUNPATH[3], such as containing relative directories, during an attempt to package BPF selftests for later use in CI: ERROR 0004: file '/usr/libexec/kselftests/bpf/urandom_read' contains an insecure runpath '.' in [.] [1] https://github.com/rpm-software-management/rpm/blob/master/scripts/check-rp… [2] https://github.com/rpm-software-management/rpm/blob/master/scripts/check-rp… [3] https://cwe.mitre.org/data/definitions/426.html Signed-off-by: Eugene Syromiatnikov <esyr(a)redhat.com> --- tools/testing/selftests/rseq/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/rseq/Makefile b/tools/testing/selftests/rseq/Makefile index 5a3432fceb58..27544a67d6f0 100644 --- a/tools/testing/selftests/rseq/Makefile +++ b/tools/testing/selftests/rseq/Makefile @@ -6,7 +6,7 @@ endif top_srcdir = ../../../.. -CFLAGS += -O2 -Wall -g -I./ $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=./ \ +CFLAGS += -O2 -Wall -g -I./ $(KHDR_INCLUDES) -L$(OUTPUT) -Wl,-rpath=\$$ORIGIN/ \ $(CLANG_FLAGS) -I$(top_srcdir)/tools/include LDLIBS += -lpthread -ldl -- 2.28.0

1 year

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[PATCH] KVM: selftests: arm64: Correct feature test for S1PIE in get-reg-list

by Mark Brown

The ID register for S1PIE is ID_AA64MMFR3_EL1.S1PIE which is bits 11:8 but get-reg-list uses a shift of 4, checking SCTLRX instead. Use a shift of 8 instead. Fixes: 5f0419a0083b ("KVM: selftests: get-reg-list: add Permission Indirection registers") Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/kvm/aarch64/get-reg-list.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kvm/aarch64/get-reg-list.c b/tools/testing/selftests/kvm/aarch64/get-reg-list.c index 709d7d721760..4abebde78187 100644 --- a/tools/testing/selftests/kvm/aarch64/get-reg-list.c +++ b/tools/testing/selftests/kvm/aarch64/get-reg-list.c @@ -32,13 +32,13 @@ static struct feature_id_reg feat_id_regs[] = { { ARM64_SYS_REG(3, 0, 10, 2, 2), /* PIRE0_EL1 */ ARM64_SYS_REG(3, 0, 0, 7, 3), /* ID_AA64MMFR3_EL1 */ - 4, + 8, 1 }, { ARM64_SYS_REG(3, 0, 10, 2, 3), /* PIR_EL1 */ ARM64_SYS_REG(3, 0, 0, 7, 3), /* ID_AA64MMFR3_EL1 */ - 4, + 8, 1 } }; --- base-commit: 8400291e289ee6b2bf9779ff1c83a291501f017b change-id: 20240731-kvm-arm64-fix-s1pie-test-a40b6be58d7b Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

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[PATCH net-next] selftests: forwarding: lib.sh: ignore "Address not found"

by Geliang Tang

From: Geliang Tang <tanggeliang(a)kylinos.cn> So many "Address not found" messages occur at the end of forwarding tests when using "ip address del" command for an invalid address: TEST: FDB limits interacting with FDB type local [ OK ] Error: ipv4: Address not found. ... ... TEST: IGMPv3 S,G port entry automatic add to a *,G port [ OK ] Error: ipv4: Address not found. Error: ipv6: address not found. ... ... TEST: Isolated port flooding [ OK ] Error: ipv4: Address not found. Error: ipv6: address not found. ... ... TEST: Externally learned FDB entry - ageing & roaming [ OK ] Error: ipv4: Address not found. Error: ipv6: address not found. This patch gnores these messages and redirects them to /dev/null in __addr_add_del(). Signed-off-by: Geliang Tang <tanggeliang(a)kylinos.cn> --- tools/testing/selftests/net/forwarding/lib.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index ff96bb7535ff..8670b6053cde 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -839,7 +839,7 @@ __addr_add_del() array=("${@}") for addrstr in "${array[@]}"; do - ip address $add_del $addrstr dev $if_name + ip address $add_del $addrstr dev $if_name &> /dev/null done } -- 2.43.0

1 year

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[PATCH v4 0/2] Enhance network interface feature testing

by Abhinav Jain

This small series includes fixes for creation of veth pairs for networkless kernels & adds tests for turning the different network interface features on and off in selftests/net/netdevice.sh script. Changes in v4: Move veth creation/removal to the main shell script. Tested using vng on a networkless kernel and the script works, sample output below the changes. Changes in v3: https://lore.kernel.org/all/20240614113240.41550-1-jain.abhinav177@gmail.co… Add a check for netdev, create veth pair for testing. Restore feature to its initial state. Changes in v2: https://lore.kernel.org/all/20240609132124.51683-1-jain.abhinav177@gmail.co… Remove tail usage; use read to parse the features from temp file. v1: https://lore.kernel.org/all/20240606212714.27472-1-jain.abhinav177@gmail.co… ``` # selftests: net: netdevice.sh # No valid network device found, creating veth pair # PASS: veth0: set interface up # PASS: veth0: set MAC address # SKIP: veth0: set IP address # PASS: veth0: ethtool list features # PASS: veth0: Turned off feature: rx-checksumming # PASS: veth0: Turned on feature: rx-checksumming # PASS: veth0: Restore feature rx-checksumming to initial state on # Actual changes: # tx-checksum-ip-generic: off # tx-tcp-segmentation: off [not requested] .... .... .... # PASS: veth1: Restore feature tx-nocache-copy to initial state off # PASS: veth1: Turned off feature: tx-vlan-stag-hw-insert # PASS: veth1: Turned on feature: tx-vlan-stag-hw-insert # PASS: veth1: Restore feature tx-vlan-stag-hw-insert to initial state on # PASS: veth1: Turned off feature: rx-vlan-stag-hw-parse # PASS: veth1: Turned on feature: rx-vlan-stag-hw-parse # PASS: veth1: Restore feature rx-vlan-stag-hw-parse to initial state on # PASS: veth1: Turned off feature: rx-gro-list # PASS: veth1: Turned on feature: rx-gro-list # PASS: veth1: Restore feature rx-gro-list to initial state off # PASS: veth1: Turned off feature: rx-udp-gro-forwarding # PASS: veth1: Turned on feature: rx-udp-gro-forwarding # PASS: veth1: Restore feature rx-udp-gro-forwarding to initial state off # Cannot get register dump: Operation not supported # SKIP: veth1: ethtool dump not supported # PASS: veth1: ethtool stats # PASS: veth1: stop interface # Removed veth pair ok 12 selftests: net: netdevice.sh ``` Abhinav Jain (2): selftests: net: Create veth pair for testing in networkless kernel selftests: net: Add on/off checks for non-fixed features of interface tools/testing/selftests/net/netdevice.sh | 55 +++++++++++++++++++++++- 1 file changed, 54 insertions(+), 1 deletion(-) -- 2.34.1

1 year

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[PATCH net-next v13 05/14] mm: page_frag: avoid caller accessing 'page_frag_cache' directly

by Yunsheng Lin

Use appropriate frag_page API instead of caller accessing 'page_frag_cache' directly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> --- drivers/vhost/net.c | 2 +- include/linux/page_frag_cache.h | 10 ++++++++++ net/core/skbuff.c | 6 +++--- net/rxrpc/conn_object.c | 4 +--- net/rxrpc/local_object.c | 4 +--- net/sunrpc/svcsock.c | 6 ++---- tools/testing/selftests/mm/page_frag/page_frag_test.c | 2 +- 7 files changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 6691fac01e0d..b2737dc0dc50 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1325,7 +1325,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) vqs[VHOST_NET_VQ_RX]); f->private_data = n; - n->pf_cache.va = NULL; + page_frag_cache_init(&n->pf_cache); return 0; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index ef038a07925c..7c9125a9aed3 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -7,6 +7,16 @@ #include <linux/types.h> #include <linux/mm_types_task.h> +static inline void page_frag_cache_init(struct page_frag_cache *nc) +{ + nc->va = NULL; +} + +static inline bool page_frag_cache_is_pfmemalloc(struct page_frag_cache *nc) +{ + return !!nc->pfmemalloc; +} + void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); void *__page_frag_alloc_va_align(struct page_frag_cache *nc, diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 6cf2c51a34e1..bb77c3fd192f 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -752,14 +752,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); data = page_frag_alloc_va(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); data = page_frag_alloc_va(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); local_bh_enable(); @@ -849,7 +849,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) len = SKB_HEAD_ALIGN(len); data = page_frag_alloc_va(&nc->page, len, gfp_mask); - pfmemalloc = nc->page.pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(&nc->page); } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 1539d315afe7..694c4df7a1a3 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -337,9 +337,7 @@ static void rxrpc_clean_up_connection(struct work_struct *work) */ rxrpc_purge_queue(&conn->rx_queue); - if (conn->tx_data_alloc.va) - __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), - conn->tx_data_alloc.pagecnt_bias); + page_frag_cache_drain(&conn->tx_data_alloc); call_rcu(&conn->rcu, rxrpc_rcu_free_connection); } diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index 504453c688d7..a8cffe47cf01 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -452,9 +452,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local) #endif rxrpc_purge_queue(&local->rx_queue); rxrpc_purge_client_connections(local); - if (local->tx_alloc.va) - __page_frag_cache_drain(virt_to_page(local->tx_alloc.va), - local->tx_alloc.pagecnt_bias); + page_frag_cache_drain(&local->tx_alloc); } /* diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 42d20412c1c3..4b1e87187614 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1609,7 +1609,6 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt) static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct page_frag_cache *pfc = &svsk->sk_frag_cache; struct socket *sock = svsk->sk_sock; trace_svcsock_free(svsk, sock); @@ -1619,8 +1618,7 @@ static void svc_sock_free(struct svc_xprt *xprt) sockfd_put(sock); else sock_release(sock); - if (pfc->va) - __page_frag_cache_drain(virt_to_head_page(pfc->va), - pfc->pagecnt_bias); + + page_frag_cache_drain(&svsk->sk_frag_cache); kfree(svsk); } diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index e522611452c9..3b98df379ce6 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -120,7 +120,7 @@ static int __init page_frag_test_init(void) u64 duration; int ret; - test_frag.va = NULL; + page_frag_cache_init(&test_frag); atomic_set(&nthreads, 2); init_completion(&wait); -- 2.33.0

1 year

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[PATCH] selftests: kvm: fix mkdir error when building for non-supported arch

by Muhammad Usama Anjum

The mkdir generates an error when kvm suite is build for non-supported architecture such as arm. Fix it by ignoring the error from mkdir. mkdir: missing operand Try 'mkdir --help' for more information. Signed-off-by: Muhammad Usama Anjum <usama.anjum(a)collabora.com> --- tools/testing/selftests/kvm/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 48d32c5aa3eb7..8ff46a0a8d1cd 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -317,7 +317,7 @@ $(LIBKVM_S_OBJ): $(OUTPUT)/%.o: %.S $(GEN_HDRS) $(LIBKVM_STRING_OBJ): $(OUTPUT)/%.o: %.c $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -ffreestanding $< -o $@ -$(shell mkdir -p $(sort $(dir $(TEST_GEN_PROGS)))) +$(shell mkdir -p $(sort $(dir $(TEST_GEN_PROGS))) > /dev/null 2>&1) $(SPLIT_TEST_GEN_OBJ): $(GEN_HDRS) $(TEST_GEN_PROGS): $(LIBKVM_OBJS) $(TEST_GEN_PROGS_EXTENDED): $(LIBKVM_OBJS) -- 2.39.2

1 year

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[RFC PATCH 0/1] Add kselftest to detect boot event slowdowns

by Laura Nao

Add a new kselftest to detect and report slowdowns in key boot events. The test uses ftrace to track timings for specific boot events and compares these timestamps against reference values provided in YAML format. The test includes the following files: - `bootconfig` file: configures ftrace and lists reference key boot events. - `config` fragment: enables boot time tracing and attaches the bootconfig file to the kernel image. - `kprobe_timestamps_to_yaml.py` script: parses the current trace file to extract event names and timestamps and writes them to a YAML file. The script is intended to be run once to generate initial reference values; the generated file is not meant to be stored in the kernel sources but should be provided as input to the test itself. YAML format was chosen to allow easy integration with per-platform data used in other tests, such as the discoverable devices probe test in tools/testing/selftests/devices. Another option is to use JSON, as the file is not intended for manual editing and JSON is already supported by the Python standard library. - `test_boot_time.py` script: parses the current trace file and compares timestamps against the values in the YAML file provided as input. Reports a failure if any timestamp differs from the reference value by more than the specified delta. - `trace_utils.py` file: utility functions to mount debugfs and parse the trace file to extract relevant information. The bootconfig file provided is an initial draft with some reference kprobe events to showcase how the test works. I would appreciate feedback from those interested in running this test on which boot events should be added. Different key events might be relevant depending on the platform and its boot time requirements. This file should serve as a common ground and be populated with critical events and functions common to different platforms. Feedback on the overall approach of this test and suggestions for additional boot events to trace would be greatly appreciated. Example output with a deliberately small delta of 0.01 to demonstrate failures: TAP version 13 1..4 ok 1 populate_rootfs_begin # 'run_init_process_begin' differs by 0.033990 seconds. not ok 2 run_init_process_begin # 'run_init_process_end' differs by 0.033796 seconds. not ok 3 run_init_process_end ok 4 unpack_to_rootfs_begin # Totals: pass:2 fail:2 xfail:0 xpass:0 skip:0 error:0 This patch depends on "kselftest: Move ksft helper module to common directory": https://lore.kernel.org/all/20240705-dev-err-log-selftest-v2-2-163b9cd7b3c1… which was picked through the usb tree and is queued for 6.11-rc1. Best, Laura Laura Nao (1): kselftests: Add test to detect boot event slowdowns tools/testing/selftests/Makefile | 1 + tools/testing/selftests/boot-time/Makefile | 17 ++++ tools/testing/selftests/boot-time/bootconfig | 8 ++ tools/testing/selftests/boot-time/config | 4 + .../boot-time/kprobe_timestamps_to_yaml.py | 55 +++++++++++ .../selftests/boot-time/test_boot_time.py | 94 +++++++++++++++++++ .../selftests/boot-time/trace_utils.py | 63 +++++++++++++ 7 files changed, 242 insertions(+) create mode 100644 tools/testing/selftests/boot-time/Makefile create mode 100644 tools/testing/selftests/boot-time/bootconfig create mode 100644 tools/testing/selftests/boot-time/config create mode 100755 tools/testing/selftests/boot-time/kprobe_timestamps_to_yaml.py create mode 100755 tools/testing/selftests/boot-time/test_boot_time.py create mode 100644 tools/testing/selftests/boot-time/trace_utils.py -- 2.30.2

1 year

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[PATCH v3 0/4] Introduce userspace-driven ALSA timers

by Ivan Orlov

There are multiple possible timer sources which could be useful for the sound stream synchronization: hrtimers, hardware clocks (e.g. PTP), timer wheels (jiffies). Currently, using one of them to synchronize the audio stream of snd-aloop module would require writing a kernel-space driver which exports an ALSA timer through the snd_timer interface. However, it is not really convenient for application developers, who may want to define their custom timer sources for audio synchronization. For instance, we could have a network application which receives frames and sends them to snd-aloop pcm device, and another application listening on the other end of snd-aloop. It makes sense to transfer a new period of data only when certain amount of frames is received through the network, but definitely not when a certain amount of jiffies on a local system elapses. Since all of the devices are purely virtual it won't introduce any glitches and will help the application developers to avoid using sample-rate conversion. This patch series introduces userspace-driven ALSA timers: virtual timers which are created and controlled from userspace. The timer can be created from the userspace using the new ioctl SNDRV_TIMER_IOCTL_CREATE. After creating a timer, it becomes available for use system-wide, so it can be passed to snd-aloop as a timer source (timer_source parameter would be "-1.SNDRV_TIMER_GLOBAL_UDRIVEN.{timer_id}"). When the userspace app decides to trigger a timer, it calls another ioctl SNDRV_TIMER_IOCTL_TRIGGER on the file descriptor of a timer. It initiates a transfer of a new period of data. Userspace-driven timers are associated with file descriptors. If the application wishes to destroy the timer, it can simply release the file descriptor of a virtual timer. I believe introducing new ioctl calls is quite inconvenient (as we have a limited amount of them), but other possible ways of app <-> kernel communication (like virtual FS) seem completely inappropriate for this task (but I'd love to discuss alternative solutions). This patch series also updates the snd-aloop module so the global timers can be used as a timer_source for it (it allows using userspace-driven timers as timer source). V1 -> V2: - Fix some problems found by Christophe Jaillet <christophe.jaillet(a)wanadoo.fr> V2 -> V3: - Add improvements suggested by Takashi Iwai <tiwai(a)suse.de> Please, find the patch-specific changelog in the following patches. Ivan Orlov (4): ALSA: aloop: Allow using global timers Docs/sound: Add documentation for userspace-driven ALSA timers ALSA: timer: Introduce virtual userspace-driven timers selftests: ALSA: Cover userspace-driven timers with test Documentation/sound/index.rst | 1 + Documentation/sound/utimers.rst | 120 +++++++++++ include/uapi/sound/asound.h | 20 +- sound/core/Kconfig | 10 + sound/core/timer.c | 221 ++++++++++++++++++++ sound/drivers/aloop.c | 2 + tools/testing/selftests/alsa/Makefile | 2 +- tools/testing/selftests/alsa/global-timer.c | 87 ++++++++ tools/testing/selftests/alsa/utimer-test.c | 170 +++++++++++++++ 9 files changed, 631 insertions(+), 2 deletions(-) create mode 100644 Documentation/sound/utimers.rst create mode 100644 tools/testing/selftests/alsa/global-timer.c create mode 100644 tools/testing/selftests/alsa/utimer-test.c -- 2.34.1

1 year

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Converting kselftest test modules to kunit

by Muhammad Usama Anjum

Hi Kees and All, There are several tests in kselftest subsystem which load modules to tests the internals of the kernel. Most of these test modules are just loaded by the kselftest, their status isn't read and reported to the user logs. Hence they don't provide benefit of executing those tests. I've found patches from Kees where he has been converting such kselftests to kunit tests [1]. The probable motivation is to move tests output of kselftest subsystem which only triggers tests without correctly reporting the results. On the other hand, kunit is there to test the kernel's internal functions which can't be done by userspace. Kselftest: Test user facing APIs from userspace Kunit: Test kernel's internal functions from kernelspace This brings me to conclusion that kselftest which are loading modules to test kernelspace should be converted to kunit tests. I've noted several such kselftests. This is just my understanding. Please mention if I'm correct above or more reasons to support kselftest test modules transformation into kunit test. [1] https://lore.kernel.org/all/20221018082824.never.845-kees@kernel.org/ -- BR, Muhammad Usama Anjum

1 year

6
17
2 0

[PATCH RFT v7 0/9] fork: Support shadow stacks in clone3()

by Mark Brown

The kernel has recently added support for shadow stacks, currently x86 only using their CET feature but both arm64 and RISC-V have equivalent features (GCS and Zicfiss respectively), I am actively working on GCS[1]. With shadow stacks the hardware maintains an additional stack containing only the return addresses for branch instructions which is not generally writeable by userspace and ensures that any returns are to the recorded addresses. This provides some protection against ROP attacks and making it easier to collect call stacks. These shadow stacks are allocated in the address space of the userspace process. Our API for shadow stacks does not currently offer userspace any flexiblity for managing the allocation of shadow stacks for newly created threads, instead the kernel allocates a new shadow stack with the same size as the normal stack whenever a thread is created with the feature enabled. The stacks allocated in this way are freed by the kernel when the thread exits or shadow stacks are disabled for the thread. This lack of flexibility and control isn't ideal, in the vast majority of cases the shadow stack will be over allocated and the implicit allocation and deallocation is not consistent with other interfaces. As far as I can tell the interface is done in this manner mainly because the shadow stack patches were in development since before clone3() was implemented. Since clone3() is readily extensible let's add support for specifying a shadow stack when creating a new thread or process in a similar manner to how the normal stack is specified, keeping the current implicit allocation behaviour if one is not specified either with clone3() or through the use of clone(). The user must provide a shadow stack address and size, this must point to memory mapped for use as a shadow stackby map_shadow_stack() with a shadow stack token at the top of the stack. Please note that the x86 portions of this code are build tested only, I don't appear to have a system that can run CET avaible to me, I have done testing with an integration into my pending work for GCS. There is some possibility that the arm64 implementation may require the use of clone3() and explicit userspace allocation of shadow stacks, this is still under discussion. Please further note that the token consumption done by clone3() is not currently implemented in an atomic fashion, Rick indicated that he would look into fixing this if people are OK with the implementation. A new architecture feature Kconfig option for shadow stacks is added as here, this was suggested as part of the review comments for the arm64 GCS series and since we need to detect if shadow stacks are supported it seemed sensible to roll it in here. [1] https://lore.kernel.org/r/20231009-arm64-gcs-v6-0-78e55deaa4dd@kernel.org/ Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v7: - Rebase onto v6.11-rc1. - Typo fixes. - Link to v6: https://lore.kernel.org/r/20240623-clone3-shadow-stack-v6-0-9ee7783b1fb9@ke… Changes in v6: - Rebase onto v6.10-rc3. - Ensure we don't try to free the parent shadow stack in error paths of x86 arch code. - Spelling fixes in userspace API document. - Additional cleanups and improvements to the clone3() tests to support the shadow stack tests. - Link to v5: https://lore.kernel.org/r/20240203-clone3-shadow-stack-v5-0-322c69598e4b@ke… Changes in v5: - Rebase onto v6.8-rc2. - Rework ABI to have the user allocate the shadow stack memory with map_shadow_stack() and a token. - Force inlining of the x86 shadow stack enablement. - Move shadow stack enablement out into a shared header for reuse by other tests. - Link to v4: https://lore.kernel.org/r/20231128-clone3-shadow-stack-v4-0-8b28ffe4f676@ke… Changes in v4: - Formatting changes. - Use a define for minimum shadow stack size and move some basic validation to fork.c. - Link to v3: https://lore.kernel.org/r/20231120-clone3-shadow-stack-v3-0-a7b8ed3e2acc@ke… Changes in v3: - Rebase onto v6.7-rc2. - Remove stale shadow_stack in internal kargs. - If a shadow stack is specified unconditionally use it regardless of CLONE_ parameters. - Force enable shadow stacks in the selftest. - Update changelogs for RISC-V feature rename. - Link to v2: https://lore.kernel.org/r/20231114-clone3-shadow-stack-v2-0-b613f8681155@ke… Changes in v2: - Rebase onto v6.7-rc1. - Remove ability to provide preallocated shadow stack, just specify the desired size. - Link to v1: https://lore.kernel.org/r/20231023-clone3-shadow-stack-v1-0-d867d0b5d4d0@ke… --- Mark Brown (9): Documentation: userspace-api: Add shadow stack API documentation selftests: Provide helper header for shadow stack testing mm: Introduce ARCH_HAS_USER_SHADOW_STACK fork: Add shadow stack support to clone3() selftests/clone3: Remove redundant flushes of output streams selftests/clone3: Factor more of main loop into test_clone3() selftests/clone3: Explicitly handle child exits due to signals selftests/clone3: Allow tests to flag if -E2BIG is a valid error code selftests/clone3: Test shadow stack support Documentation/userspace-api/index.rst | 1 + Documentation/userspace-api/shadow_stack.rst | 41 ++++ arch/x86/Kconfig | 1 + arch/x86/include/asm/shstk.h | 11 +- arch/x86/kernel/process.c | 2 +- arch/x86/kernel/shstk.c | 104 +++++++--- fs/proc/task_mmu.c | 2 +- include/linux/mm.h | 2 +- include/linux/sched/task.h | 13 ++ include/uapi/linux/sched.h | 13 +- kernel/fork.c | 76 ++++++-- mm/Kconfig | 6 + tools/testing/selftests/clone3/clone3.c | 224 ++++++++++++++++++---- tools/testing/selftests/clone3/clone3_selftests.h | 40 +++- tools/testing/selftests/ksft_shstk.h | 63 ++++++ 15 files changed, 511 insertions(+), 88 deletions(-) --- base-commit: 8400291e289ee6b2bf9779ff1c83a291501f017b change-id: 20231019-clone3-shadow-stack-15d40d2bf536 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

3
22
0 0

[PATCH v1] selftest mm/mseal: fix test_seal_mremap_move_dontunmap_anyaddr

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)chromium.org> the syscall remap accepts following: sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, (void*) 0xdead0000) when the src is sealed, the call will fail with when error code: EPERM Also remove the dependency on glibc for mremap(), the previous version of test pass on certain version of glibc and fail in another. By calling syscall directly, we test and verify remap function in kernel directly. Signed-off-by: Jeff Xu <jeffxu(a)chromium.org> Reported-by: Pedro Falcato <pedro.falcato(a)gmail.com> --- tools/testing/selftests/mm/mseal_test.c | 44 ++++++++++++++----------- 1 file changed, 25 insertions(+), 19 deletions(-) diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/selftests/mm/mseal_test.c index a818f010de47..45d299fd74ed 100644 --- a/tools/testing/selftests/mm/mseal_test.c +++ b/tools/testing/selftests/mm/mseal_test.c @@ -110,6 +110,16 @@ static int sys_madvise(void *start, size_t len, int types) return sret; } +static void *sys_mremap(void *addr, size_t old_len, size_t new_len, + unsigned long flags, void *new_addr) +{ + void *sret; + + errno = 0; + sret = (void *) syscall(__NR_mremap, addr, old_len, new_len, flags, new_addr); + return sret; +} + static int sys_pkey_alloc(unsigned long flags, unsigned long init_val) { int ret = syscall(__NR_pkey_alloc, flags, init_val); @@ -1115,12 +1125,12 @@ static void test_seal_mremap_shrink(bool seal) } /* shrink from 4 pages to 2 pages. */ - ret2 = mremap(ptr, size, 2 * page_size, 0, 0); + ret2 = sys_mremap(ptr, size, 2 * page_size, 0, 0); if (seal) { - FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); + FAIL_TEST_IF_FALSE(ret2 == (void *) MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); } else { - FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); + FAIL_TEST_IF_FALSE(ret2 != (void *) MAP_FAILED); } @@ -1147,7 +1157,7 @@ static void test_seal_mremap_expand(bool seal) } /* expand from 2 page to 4 pages. */ - ret2 = mremap(ptr, 2 * page_size, 4 * page_size, 0, 0); + ret2 = sys_mremap(ptr, 2 * page_size, 4 * page_size, 0, 0); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); @@ -1180,7 +1190,7 @@ static void test_seal_mremap_move(bool seal) } /* move from ptr to fixed address. */ - ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newPtr); + ret2 = sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newPtr); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); @@ -1299,7 +1309,7 @@ static void test_seal_mremap_shrink_fixed(bool seal) } /* mremap to move and shrink to fixed address */ - ret2 = mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED, + ret2 = sys_mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); @@ -1330,7 +1340,7 @@ static void test_seal_mremap_expand_fixed(bool seal) } /* mremap to move and expand to fixed address */ - ret2 = mremap(ptr, page_size, size, MREMAP_MAYMOVE | MREMAP_FIXED, + ret2 = sys_mremap(ptr, page_size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); @@ -1361,7 +1371,7 @@ static void test_seal_mremap_move_fixed(bool seal) } /* mremap to move to fixed address */ - ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr); + ret2 = sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); @@ -1390,14 +1400,13 @@ static void test_seal_mremap_move_fixed_zero(bool seal) /* * MREMAP_FIXED can move the mapping to zero address */ - ret2 = mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED, + ret2 = sys_mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED, 0); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); } else { FAIL_TEST_IF_FALSE(ret2 == 0); - } REPORT_TEST_PASS(); @@ -1420,13 +1429,12 @@ static void test_seal_mremap_move_dontunmap(bool seal) } /* mremap to move, and don't unmap src addr. */ - ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, 0); + ret2 = sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, 0); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); } else { FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); - } REPORT_TEST_PASS(); @@ -1449,18 +1457,16 @@ static void test_seal_mremap_move_dontunmap_anyaddr(bool seal) } /* - * The 0xdeaddead should not have effect on dest addr + * The 0xdead0000 should not have effect on dest addr * when MREMAP_DONTUNMAP is set. */ - ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, - 0xdeaddead); + ret2 = sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, + (void *) 0xdead0000); if (seal) { - FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); + FAIL_TEST_IF_FALSE(ret2 == (void *) MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); } else { - FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); - FAIL_TEST_IF_FALSE((long)ret2 != 0xdeaddead); - + FAIL_TEST_IF_FALSE(ret2 == (void *) 0xdead0000); } REPORT_TEST_PASS(); -- 2.46.0.rc2.264.g509ed76dc8-goog

1 year

4
5
0 0

[PATCH v2] selftest mm/mseal: fix test_seal_mremap_move_dontunmap_anyaddr

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)chromium.org> the syscall remap accepts following: mremap(src, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, dst) when the src is sealed, the call will fail with error code: EPERM Previously, the test uses hard-coded 0xdeaddead as dst, and it will fail on the system with newer glibc installed. This patch removes test's dependency on glibc for mremap(), also fix the test and remove the hardcoded address. Signed-off-by: Jeff Xu <jeffxu(a)chromium.org> Reported-by: Pedro Falcato <pedro.falcato(a)gmail.com> --- tools/testing/selftests/mm/mseal_test.c | 57 ++++++++++++++++--------- 1 file changed, 36 insertions(+), 21 deletions(-) diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/selftests/mm/mseal_test.c index a818f010de47..5bce2fe102ab 100644 --- a/tools/testing/selftests/mm/mseal_test.c +++ b/tools/testing/selftests/mm/mseal_test.c @@ -110,6 +110,16 @@ static int sys_madvise(void *start, size_t len, int types) return sret; } +static void *sys_mremap(void *addr, size_t old_len, size_t new_len, + unsigned long flags, void *new_addr) +{ + void *sret; + + errno = 0; + sret = (void *) syscall(__NR_mremap, addr, old_len, new_len, flags, new_addr); + return sret; +} + static int sys_pkey_alloc(unsigned long flags, unsigned long init_val) { int ret = syscall(__NR_pkey_alloc, flags, init_val); @@ -1115,12 +1125,12 @@ static void test_seal_mremap_shrink(bool seal) } /* shrink from 4 pages to 2 pages. */ - ret2 = mremap(ptr, size, 2 * page_size, 0, 0); + ret2 = sys_mremap(ptr, size, 2 * page_size, 0, 0); if (seal) { - FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); + FAIL_TEST_IF_FALSE(ret2 == (void *) MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); } else { - FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); + FAIL_TEST_IF_FALSE(ret2 != (void *) MAP_FAILED); } @@ -1147,7 +1157,7 @@ static void test_seal_mremap_expand(bool seal) } /* expand from 2 page to 4 pages. */ - ret2 = mremap(ptr, 2 * page_size, 4 * page_size, 0, 0); + ret2 = sys_mremap(ptr, 2 * page_size, 4 * page_size, 0, 0); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); @@ -1180,7 +1190,7 @@ static void test_seal_mremap_move(bool seal) } /* move from ptr to fixed address. */ - ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newPtr); + ret2 = sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newPtr); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); @@ -1299,7 +1309,7 @@ static void test_seal_mremap_shrink_fixed(bool seal) } /* mremap to move and shrink to fixed address */ - ret2 = mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED, + ret2 = sys_mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); @@ -1330,7 +1340,7 @@ static void test_seal_mremap_expand_fixed(bool seal) } /* mremap to move and expand to fixed address */ - ret2 = mremap(ptr, page_size, size, MREMAP_MAYMOVE | MREMAP_FIXED, + ret2 = sys_mremap(ptr, page_size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); @@ -1361,7 +1371,7 @@ static void test_seal_mremap_move_fixed(bool seal) } /* mremap to move to fixed address */ - ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr); + ret2 = sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); @@ -1390,14 +1400,13 @@ static void test_seal_mremap_move_fixed_zero(bool seal) /* * MREMAP_FIXED can move the mapping to zero address */ - ret2 = mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED, + ret2 = sys_mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED, 0); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); } else { FAIL_TEST_IF_FALSE(ret2 == 0); - } REPORT_TEST_PASS(); @@ -1420,13 +1429,13 @@ static void test_seal_mremap_move_dontunmap(bool seal) } /* mremap to move, and don't unmap src addr. */ - ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, 0); + ret2 = sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, 0); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); } else { + /* kernel will allocate a new address */ FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); - } REPORT_TEST_PASS(); @@ -1434,7 +1443,7 @@ static void test_seal_mremap_move_dontunmap(bool seal) static void test_seal_mremap_move_dontunmap_anyaddr(bool seal) { - void *ptr; + void *ptr, *ptr2; unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; @@ -1449,24 +1458,30 @@ static void test_seal_mremap_move_dontunmap_anyaddr(bool seal) } /* - * The 0xdeaddead should not have effect on dest addr - * when MREMAP_DONTUNMAP is set. + * The new address is any address that not allocated. + * use allocate/free to similate that. */ - ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, - 0xdeaddead); + setup_single_address(size, &ptr2); + FAIL_TEST_IF_FALSE(ptr2 != (void *)-1); + ret = sys_munmap(ptr2, size); + FAIL_TEST_IF_FALSE(!ret); + + /* + * remap to any address. + */ + ret2 = sys_mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, + (void *) ptr2); if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); } else { - FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); - FAIL_TEST_IF_FALSE((long)ret2 != 0xdeaddead); - + /* remap success and return ptr2 */ + FAIL_TEST_IF_FALSE(ret2 == ptr2); } REPORT_TEST_PASS(); } - static void test_seal_merge_and_split(void) { void *ptr; -- 2.46.0.76.ge559c4bf1a-goog

1 year

1
0
0 0

[PATCH] tracing/selftests: Run the ownership test twice

by Steven Rostedt

From: "Steven Rostedt (Google)" <rostedt(a)goodmis.org> A regression happened where running the ownership test passes on the first iteration but fails running it a second time. This was caught and fixed, but a later change brought it back. The regression was missed because the automated tests only run the tests once per boot. Change the ownership test to iterate through the tests twice, as this will catch the regression with a single run. Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- .../ftrace/test.d/00basic/test_ownership.tc | 34 +++++++++++-------- 1 file changed, 20 insertions(+), 14 deletions(-) diff --git a/tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc b/tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc index c45094d1e1d2..71e43a92352a 100644 --- a/tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc +++ b/tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc @@ -83,32 +83,38 @@ run_tests() { done } -mount -o remount,"$new_options" . +# Run the tests twice as leftovers can cause issues +for loop in 1 2 ; do -run_tests + echo "Running iteration $loop" -mount -o remount,"$mount_options" . + mount -o remount,"$new_options" . -for d in "." "events" "events/sched" "events/sched/sched_switch" "events/sched/sched_switch/enable" $canary; do - test "$d" $original_group -done + run_tests + + mount -o remount,"$mount_options" . + + for d in "." "events" "events/sched" "events/sched/sched_switch" "events/sched/sched_switch/enable" $canary; do + test "$d" $original_group + done # check instances as well -chgrp $other_group instances + chgrp $other_group instances -instance="$(mktemp -u test-XXXXXX)" + instance="$(mktemp -u test-XXXXXX)" -mkdir instances/$instance + mkdir instances/$instance -cd instances/$instance + cd instances/$instance -run_tests + run_tests -cd ../.. + cd ../.. -rmdir instances/$instance + rmdir instances/$instance -chgrp $original_group instances + chgrp $original_group instances +done exit 0 -- 2.43.0

1 year

3
4
0 0

[PATCH] selftests/uprobes: Add a basic uprobe testcase

by Masami Hiramatsu (Google)

From: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Add a basic uprobe testcase which checks whether add/remove/trace operations works on /bin/sh. Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> --- .../ftrace/test.d/dynevent/add_remove_uprobe.tc | 26 ++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_uprobe.tc diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_uprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_uprobe.tc new file mode 100644 index 000000000000..a275decdc880 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_uprobe.tc @@ -0,0 +1,26 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Generic dynamic event - add/remove/test uprobe events +# requires: uprobe_events + +echo 0 > events/enable +echo > dynamic_events + +echo 'cat /proc/$$/maps' | /bin/sh | \ + grep "r-xp .*/bin/.*sh$" | \ + awk '{printf "p:myevent %s:0x%s\n", $6,$3 }' >> uprobe_events + +grep -q myevent uprobe_events +test -d events/uprobes/myevent + +echo 1 > events/uprobes/myevent/enable +echo 'ls' | /bin/sh > /dev/null +echo 0 > events/uprobes/myevent/enable +grep -q myevent trace + +echo "-:myevent" >> uprobe_events +! grep -q myevent uprobe_events + +echo > uprobe_events + +clear_trace

1 year

3
2
0 0

[PATCH 0/2] mseal: Fix is_madv_discard()

by Pedro Falcato

This small series fixes is_madv_discard() and adds a small sanity check test to selftests/mm/mseal_test. Without this patch, is_madv_discard() erroneously thinks innocent ops like MADV_RANDOM are discard operations (which they are not, and are supposed to be allowed, per the overall design). Based on Linus's tree and taken from my mseal depessimization series[1]. [1]: https://lore.kernel.org/all/20240806212808.1885309-1-pedro.falcato@gmail.co… Pedro Falcato (2): mseal: Fix is_madv_discard() selftests/mm: Add mseal test for no-discard madvise mm/mseal.c | 14 +++++++--- tools/testing/selftests/mm/mseal_test.c | 34 +++++++++++++++++++++++++ 2 files changed, 45 insertions(+), 3 deletions(-) -- 2.46.0

1 year

2
6
0 0

[PATCH v3 0/4] iommu: Support IOMMU_RESV_SW_MSI with nesting

by Nicolin Chen

The dma-iommu needs to find the correct domain for MSI mapping. With an IOMMU_DOMAIN_NESTED, the mapping resides in its parent paging domain. Add a get_msi_mapping_domain op for drivers to return paging domains. Add an iommufd selftest coverage for that, by doing a loopback test. Add arm_smmu_get_msi_mapping_domain in the SMMUv3 driver so its nesting feature could work with MSI correctly. This is based on top of the reserved-IOVA change: https://lore.kernel.org/all/20240802053458.2754673-1-nicolinc@nvidia.com/ And Jason's SMMUv3 nesting series: https://lore.kernel.org/all/0-v1-54e734311a7f+14f72-smmuv3_nesting_jgg@nvid… This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_nesting_sw_msi/ [changelog] v3: * Refined PATCH-2 commit message * Added domain->ops check in PATCH-2 * Added PATCH-4 to implement in SMMUv3 driver v2: https://lore.kernel.org/all/cover.1722644866.git.nicolinc@nvidia.com/ * Resent with a proper bug fix. Thanks Nicolin Nicolin Chen (3): iommufd: Reorder include files iommufd/selftest: Add coverage for IOMMU_RESV_SW_MSI iommu/arm-smmu-v3: Implement arm_smmu_get_msi_mapping_domain Robin Murphy (1): iommu/dma: Support MSIs through nested domains drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 10 ++ drivers/iommu/dma-iommu.c | 18 +++- drivers/iommu/iommufd/device.c | 4 +- drivers/iommu/iommufd/fault.c | 4 +- drivers/iommu/iommufd/io_pagetable.c | 8 +- drivers/iommu/iommufd/io_pagetable.h | 2 +- drivers/iommu/iommufd/ioas.c | 2 +- drivers/iommu/iommufd/iommufd_private.h | 9 +- drivers/iommu/iommufd/iommufd_test.h | 6 +- drivers/iommu/iommufd/iova_bitmap.c | 2 +- drivers/iommu/iommufd/main.c | 8 +- drivers/iommu/iommufd/pages.c | 10 +- drivers/iommu/iommufd/selftest.c | 92 ++++++++++++++++++- include/linux/iommu.h | 4 + include/linux/iommufd.h | 4 +- include/uapi/linux/iommufd.h | 2 +- tools/testing/selftests/iommu/iommufd_utils.h | 9 ++ 17 files changed, 160 insertions(+), 34 deletions(-) -- 2.43.0

1 year

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[PATCH v4 00/10] selftests: kvm: s390: Add s390x ucontrol selftests

by Christoph Schlameuss

This patch series adds a selftest suite to validate the s390x architecture specific ucontrol KVM interface. When creating a VM on s390x it is possible to create it as userspace controlled VM or in short ucontrol VM. These VMs delegates the management of the VM to userspace instead of handling most events within the kernel. Consequently the userspace has to manage interrupts, memory allocation etc. Before this patch set this functionality lacks any public test cases. It is desirable to add test cases for this interface to be able to reduce the risk of breaking changes in the future. In order to provision a ucontrol VM the kernel needs to be compiled with the CONFIG_KVM_S390_UCONTROL enabled. The users with sys_admin capability can then create a new ucontrol VM providing the KVM_VM_S390_UCONTROL parameter to the KVM_CREATE_VM ioctl. The kernels existing selftest helper functions can only be partially be reused for these tests. The test cases cover existing special handling of ucontrol VMs within the implementation and basic VM creation and handling cases: * Reject setting HPAGE when VM is ucontrol * Assert KVM_GET_DIRTY_LOG is rejected * Assert KVM_S390_VM_MEM_LIMIT_SIZE is rejected * Assert state of initial SIE flags setup by the kernel * Run simple program in VM with and without DAT * Assert KVM_EXIT_S390_UCONTROL exit on not mapped memory access * Assert functionality of storage keys in ucontrol VM Running the test cases requires sys_admin capabilities to start the ucontrol VM. This can be achieved by running as root or with a command like: sudo setpriv --reuid nobody --inh-caps -all,+sys_admin \ --ambient-caps -all,+sys_admin --bounding-set -all,+sys_admin \ ./ucontrol_test The patch set does also contain some code cleanup / consolidation of architecture specific defines that are now used in multiple test cases. --- v4: - PATCH 5: Remove not yet used include for debug print functions - PATCH 6: Add include for debug print functions (removed from patch 5) Remove no longer needed code since stopped but is reset before starting since v3 (thanks Janosch) Adjust test output to use leading zeros instead of spaces in sieic - PATCH 7: Rename constant to PGM_SEGMENT_TRANSLATION (thanks Janosch) Put comments on their own lines v3: - Remove stopped bit before starting the VM (no initial stop in multiple test cases) (thanks Janosch) - PATCH 2: Clarified SIE control block vs SIE instruction (thanks Janosch) - PATCH 3: Make use of CAP_TO_MASK(CAP_SYS_ADMIN) instead of custom define (thanks Janosch) Removed Reviewed-By: Claudio - PATCH 4: Remove erroneous 1MB offset from self->base_hva (thanks Janosch) - PATCH 6-8: Change name of test program _pgm to _asm to prevent confusion - PATCH 10: Move KVM_S390_UCONTROL default option to actual debug config (thanks Christian) v2: - add ucontrol to s390 debug config (new patch) - PATCH 2: changed atomic_t to __u32 (thanks Claudio) - PATCH 4: reformatted comment in FIXTURE_SETUP(uc_kvm) - PATCH 5: refactored to display 8 byte blocks + more internal reuse (thanks Claudio) - PATCH 7: make use of more declarative defines instead of magic values - PATCH 8: make use of more declarative defines instead of magic values (thanks Claudio) - PATCH 9: add reference to fix verified by the test case Christoph Schlameuss (10): selftests: kvm: s390: Define page sizes in shared header selftests: kvm: s390: Add kvm_s390_sie_block definition for userspace tests selftests: kvm: s390: Add s390x ucontrol test suite with hpage test selftests: kvm: s390: Add test fixture and simple VM setup tests selftests: kvm: s390: Add debug print functions selftests: kvm: s390: Add VM run test case selftests: kvm: s390: Add uc_map_unmap VM test case selftests: kvm: s390: Add uc_skey VM test case selftests: kvm: s390: Verify reject memory region operations for ucontrol VMs s390: Enable KVM_S390_UCONTROL config in debug_defconfig arch/s390/configs/debug_defconfig | 1 + tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/include/s390x/debug_print.h | 69 ++ .../selftests/kvm/include/s390x/processor.h | 5 + .../testing/selftests/kvm/include/s390x/sie.h | 240 +++++++ .../selftests/kvm/lib/s390x/processor.c | 10 +- tools/testing/selftests/kvm/s390x/cmma_test.c | 7 +- tools/testing/selftests/kvm/s390x/config | 2 + .../testing/selftests/kvm/s390x/debug_test.c | 4 +- tools/testing/selftests/kvm/s390x/memop.c | 4 +- tools/testing/selftests/kvm/s390x/tprot.c | 5 +- .../selftests/kvm/s390x/ucontrol_test.c | 596 ++++++++++++++++++ 13 files changed, 929 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/s390x/debug_print.h create mode 100644 tools/testing/selftests/kvm/include/s390x/sie.h create mode 100644 tools/testing/selftests/kvm/s390x/config create mode 100644 tools/testing/selftests/kvm/s390x/ucontrol_test.c base-commit: c0ecd6388360d930440cc5554026818895199923 -- 2.45.2

1 year

2
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[PATCH net-next v2 0/7] net/selftests: TCP-AO selftests updates

by Dmitry Safonov via B4 Relay

First 4 patches are more-or-less cleanups/preparations. Patch 5 was sent to me/contributed off-list by Mohammad, who wants 32-bit kernels to run TCP-AO. Patch 6 is a workaround/fix for slow VMs. Albeit, I can't reproduce the issue, but I hope it will fix netdev flakes for connect-deny-* tests. And the biggest change is adding TCP-AO tracepoints to selftests. I think it's a good addition by the following reasons: - The related tracepoints are now tested; - It allows tcp-ao selftests to raise expectations on the kernel behavior - up from the syscalls exit statuses + net counters. - Provides tracepoints usage samples. As tracepoints are not a stable ABI, any kernel changes done to them will be reflected to the selftests, which also will allow users to see how to change their code. It's quite better than parsing dmesg (what BGP was doing pre-tracepoints, ugh). Somewhat arguably, the code parses trace_pipe, rather than uses libtraceevent (which any sane user should do). The reason behind that is the same as for rt-netlink macros instead of libmnl: I'm trying to minimize the library dependencies of the selftests. And the performance of formatting text in kernel and parsing it again in a test is not critical. Current output sample: > ok 73 Trace events matched expectations: 13 tcp_hash_md5_required[2] tcp_hash_md5_unexpected[4] tcp_hash_ao_required[3] tcp_ao_key_not_found[4] Previously, tracepoints selftests were part of kernel tcp tracepoints submission [1], but since then the code was quite changed: - Now generic tracing setup is in lib/ftrace.c, separate from lib/ftrace-tcp.c which utilizes TCP trace points. This separation allows future selftests to trace non-TCP events, i.e. to find out an skb's drop reason, which was useful in the creation of TCP-CLOSE stress-test (not in this patch set, but used in attempt to reproduce the issue from [2]). - Another change is that in the previous submission the trace events where used only to detect unexpected TCP-AO/TCP-MD5 events. In this version the selftests will fail if an expected trace event didn't appear. Let's see how reliable this is on the netdev bot - it obviously passes on my testing, but potentially may require a temporary XFAIL patch if it misbehaves on a slow VM. [1] https://lore.kernel.org/lkml/20240224-tcp-ao-tracepoints-v1-0-15f31b7f30a7@… [2] https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3… Signed-off-by: Dmitry Safonov <0x7f454c46(a)gmail.com> --- Changes in v2: - Fixed two issues with parsing TCP-AO events: the socket state and TCP segment flags. Hopefully, won't fail on netdev. - Reword patch 1 & 2 messages to be more informative and at some degree formal (Paolo) - Since commit e33a02ed6a4f ("selftests: Add printf attribute to kselftest prints") it's possible to use __printf instead of "raw" gcc attribute - switch using that, as checkpatch suggests. - Link to v1: https://lore.kernel.org/r/20240730-tcp-ao-selftests-upd-6-12-v1-0-ffd4bf15d… --- Dmitry Safonov (6): selftests/net: Clean-up double assignment selftests/net: Provide test_snprintf() helper selftests/net: Be consistent in kconfig checks selftests/net: Don't forget to close nsfd after switch_save_ns() selftests/net: Synchronize client/server before counters checks selftests/net: Add trace events matching to tcp_ao Mohammad Nassiri (1): selftests/tcp_ao: Fix printing format for uint64_t tools/testing/selftests/net/tcp_ao/Makefile | 3 +- tools/testing/selftests/net/tcp_ao/bench-lookups.c | 2 +- tools/testing/selftests/net/tcp_ao/config | 1 + tools/testing/selftests/net/tcp_ao/connect-deny.c | 25 +- tools/testing/selftests/net/tcp_ao/connect.c | 6 +- tools/testing/selftests/net/tcp_ao/icmps-discard.c | 2 +- .../testing/selftests/net/tcp_ao/key-management.c | 18 +- tools/testing/selftests/net/tcp_ao/lib/aolib.h | 176 ++++++- .../testing/selftests/net/tcp_ao/lib/ftrace-tcp.c | 549 +++++++++++++++++++++ tools/testing/selftests/net/tcp_ao/lib/ftrace.c | 466 +++++++++++++++++ tools/testing/selftests/net/tcp_ao/lib/kconfig.c | 31 +- tools/testing/selftests/net/tcp_ao/lib/setup.c | 15 +- tools/testing/selftests/net/tcp_ao/lib/sock.c | 1 - tools/testing/selftests/net/tcp_ao/lib/utils.c | 26 + tools/testing/selftests/net/tcp_ao/restore.c | 30 +- tools/testing/selftests/net/tcp_ao/rst.c | 2 +- tools/testing/selftests/net/tcp_ao/self-connect.c | 19 +- tools/testing/selftests/net/tcp_ao/seq-ext.c | 28 +- .../selftests/net/tcp_ao/setsockopt-closed.c | 6 +- tools/testing/selftests/net/tcp_ao/unsigned-md5.c | 35 +- 20 files changed, 1375 insertions(+), 66 deletions(-) --- base-commit: 3361a6eae59664ffae640ff7a838f5bd89c24461 change-id: 20240730-tcp-ao-selftests-upd-6-12-4d3e53a74f3f Best regards, -- Dmitry Safonov <0x7f454c46(a)gmail.com>

1 year

4
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[PATCH v7] mm, memcg: cg2 memory{.swap,}.peak write handlers

by David Finkel

This revision only updates the tests from the previous revision[1], and integrates an Acked-by[2] and a Reviewed-By[3] into the first commit message. Documentation/admin-guide/cgroup-v2.rst | 22 ++- include/linux/cgroup-defs.h | 5 + include/linux/cgroup.h | 3 + include/linux/memcontrol.h | 5 + include/linux/page_counter.h | 11 +- kernel/cgroup/cgroup-internal.h | 2 + kernel/cgroup/cgroup.c | 7 + mm/memcontrol.c | 116 +++++++++++++-- mm/page_counter.c | 30 +++- tools/testing/selftests/cgroup/cgroup_util.c | 22 +++ tools/testing/selftests/cgroup/cgroup_util.h | 2 + tools/testing/selftests/cgroup/test_memcontrol.c | 264 ++++++++++++++++++++++++++++++++- 12 files changed, 454 insertions(+), 35 deletions(-) [1]: https://lore.kernel.org/cgroups/20240729143743.34236-1-davidf@vimeo.com/T/ [2]: https://lore.kernel.org/cgroups/20240729143743.34236-1-davidf@vimeo.com/T/#… [3]: https://lore.kernel.org/cgroups/20240729143743.34236-1-davidf@vimeo.com/T/#… Thank you all for the support and reviews so far! David Finkel Senior Principal Software Engineer Vimeo Inc.

1 year

4
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[PATCH v2 0/2] selftests: harness: refactor __constructor_order

by Masahiro Yamada

This series refactors __constructor_order because __constructor_order_last() is unneeded. No code change since v1. I reworded "reverse-order" to "backward-order" in commit description. Masahiro Yamada (2): selftests: harness: remove unneeded __constructor_order_last() selftests: harness: rename __constructor_order for clarification .../drivers/s390x/uvdevice/test_uvdevice.c | 6 ------ tools/testing/selftests/hid/hid_bpf.c | 6 ------ tools/testing/selftests/kselftest_harness.h | 18 ++++-------------- tools/testing/selftests/rtc/rtctest.c | 7 ------- 4 files changed, 4 insertions(+), 33 deletions(-) -- 2.43.0

1 year

3
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[PATCH v3] lib: Convert test_user_copy to KUnit test

by Vitor Massaru Iha

This adds the conversion of the runtime tests of test_user_copy fuctions, from `lib/test_user_copy.c`to KUnit tests. Signed-off-by: Vitor Massaru Iha <vitor(a)massaru.org> --- v2: * splitted patch in 3: - Allows to install and load modules in root filesystem; - Provides an userspace memory context when tests are compiled as module; - Convert test_user_copy to KUnit test; * removed entry for CONFIG_TEST_USER_COPY; * replaced pr_warn to KUNIT_EXPECT_FALSE_MSG in test macro to decrease the diff; v3: * rebased with last kunit branch * Please apply this commit from kunit-fixes: 3f37d14b8a3152441f36b6bc74000996679f0998 And these from patchwork: https://patchwork.kernel.org/patch/11676331/ https://patchwork.kernel.org/patch/11676335/ --- lib/Kconfig.debug | 28 ++++++++------ lib/Makefile | 2 +- lib/{test_user_copy.c => user_copy_kunit.c} | 42 +++++++++------------ 3 files changed, 35 insertions(+), 37 deletions(-) rename lib/{test_user_copy.c => user_copy_kunit.c} (91%) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 9ad9210d70a1..f699a3624ae7 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2078,18 +2078,6 @@ config TEST_VMALLOC If unsure, say N. -config TEST_USER_COPY - tristate "Test user/kernel boundary protections" - depends on m - help - This builds the "test_user_copy" module that runs sanity checks - on the copy_to/from_user infrastructure, making sure basic - user/kernel boundary testing is working. If it fails to load, - a regression has been detected in the user/kernel memory boundary - protections. - - If unsure, say N. - config TEST_BPF tristate "Test BPF filter functionality" depends on m && NET @@ -2154,6 +2142,22 @@ config SYSCTL_KUNIT_TEST If unsure, say N. +config USER_COPY_KUNIT + tristate "KUnit Test for user/kernel boundary protections" + depends on KUNIT + depends on m + help + This builds the "user_copy_kunit" module that runs sanity checks + on the copy_to/from_user infrastructure, making sure basic + user/kernel boundary testing is working. If it fails to load, + a regression has been detected in the user/kernel memory boundary + protections. + + For more information on KUnit and unit tests in general please refer + to the KUnit documentation in Documentation/dev-tools/kunit/. + + If unsure, say N. + config LIST_KUNIT_TEST tristate "KUnit Test for Kernel Linked-list structures" if !KUNIT_ALL_TESTS depends on KUNIT diff --git a/lib/Makefile b/lib/Makefile index b1c42c10073b..8c145f85accc 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -78,7 +78,6 @@ obj-$(CONFIG_TEST_VMALLOC) += test_vmalloc.o obj-$(CONFIG_TEST_OVERFLOW) += test_overflow.o obj-$(CONFIG_TEST_RHASHTABLE) += test_rhashtable.o obj-$(CONFIG_TEST_SORT) += test_sort.o -obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o obj-$(CONFIG_TEST_PRINTF) += test_printf.o @@ -318,3 +317,4 @@ obj-$(CONFIG_OBJAGG) += objagg.o # KUnit tests obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o +obj-$(CONFIG_USER_COPY_KUNIT) += user_copy_kunit.o diff --git a/lib/test_user_copy.c b/lib/user_copy_kunit.c similarity index 91% rename from lib/test_user_copy.c rename to lib/user_copy_kunit.c index 5ff04d8fe971..a10ddd15b4cd 100644 --- a/lib/test_user_copy.c +++ b/lib/user_copy_kunit.c @@ -16,6 +16,7 @@ #include <linux/slab.h> #include <linux/uaccess.h> #include <linux/vmalloc.h> +#include <kunit/test.h> /* * Several 32-bit architectures support 64-bit {get,put}_user() calls. @@ -35,7 +36,7 @@ ({ \ int cond = (condition); \ if (cond) \ - pr_warn("[%d] " msg "\n", __LINE__, ##__VA_ARGS__); \ + KUNIT_EXPECT_FALSE_MSG(test, cond, msg, ##__VA_ARGS__); \ cond; \ }) @@ -44,7 +45,7 @@ static bool is_zeroed(void *from, size_t size) return memchr_inv(from, 0x0, size) == NULL; } -static int test_check_nonzero_user(char *kmem, char __user *umem, size_t size) +static int test_check_nonzero_user(struct kunit *test, char *kmem, char __user *umem, size_t size) { int ret = 0; size_t start, end, i, zero_start, zero_end; @@ -102,7 +103,7 @@ static int test_check_nonzero_user(char *kmem, char __user *umem, size_t size) return ret; } -static int test_copy_struct_from_user(char *kmem, char __user *umem, +static int test_copy_struct_from_user(struct kunit *test, char *kmem, char __user *umem, size_t size) { int ret = 0; @@ -177,7 +178,7 @@ static int test_copy_struct_from_user(char *kmem, char __user *umem, return ret; } -static int __init test_user_copy_init(void) +static void user_copy_test(struct kunit *test) { int ret = 0; char *kmem; @@ -192,16 +193,14 @@ static int __init test_user_copy_init(void) #endif kmem = kmalloc(PAGE_SIZE * 2, GFP_KERNEL); - if (!kmem) - return -ENOMEM; + KUNIT_EXPECT_FALSE_MSG(test, kmem == NULL, "kmalloc failed"); user_addr = vm_mmap(NULL, 0, PAGE_SIZE * 2, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS | MAP_PRIVATE, 0); if (user_addr >= (unsigned long)(TASK_SIZE)) { - pr_warn("Failed to allocate user memory\n"); kfree(kmem); - return -ENOMEM; + KUNIT_FAIL(test, "Failed to allocate user memory"); } usermem = (char __user *)user_addr; @@ -245,9 +244,9 @@ static int __init test_user_copy_init(void) #undef test_legit /* Test usage of check_nonzero_user(). */ - ret |= test_check_nonzero_user(kmem, usermem, 2 * PAGE_SIZE); + ret |= test_check_nonzero_user(test, kmem, usermem, 2 * PAGE_SIZE); /* Test usage of copy_struct_from_user(). */ - ret |= test_copy_struct_from_user(kmem, usermem, 2 * PAGE_SIZE); + ret |= test_copy_struct_from_user(test, kmem, usermem, 2 * PAGE_SIZE); /* * Invalid usage: none of these copies should succeed. @@ -309,23 +308,18 @@ static int __init test_user_copy_init(void) vm_munmap(user_addr, PAGE_SIZE * 2); kfree(kmem); - - if (ret == 0) { - pr_info("tests passed.\n"); - return 0; - } - - return -EINVAL; } -module_init(test_user_copy_init); - -static void __exit test_user_copy_exit(void) -{ - pr_info("unloaded.\n"); -} +static struct kunit_case user_copy_test_cases[] = { + KUNIT_CASE(user_copy_test), + {} +}; -module_exit(test_user_copy_exit); +static struct kunit_suite user_copy_test_suite = { + .name = "user_copy", + .test_cases = user_copy_test_cases, +}; +kunit_test_suites(&user_copy_test_suite); MODULE_AUTHOR("Kees Cook <keescook(a)chromium.org>"); MODULE_LICENSE("GPL"); base-commit: d43c7fb05765152d4d4a39a8ef957c4ea14d8847 -- 2.26.2

1 year

4
11
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[PATCH bpf-next 0/4] selftests/bpf: convert three other cgroup tests to test_progs

by Alexis Lothoré (eBPF Foundation)

Hello, this series brings a new set of test converted to the test_progs framework. Since the tests are quite small, I chose to group three tests conversion in the same series, but feel free to let me know if I should keep one series per test. The series focuses on cgroup testing and converts the following tests: - get_cgroup_id_user - cgroup_storage - test_skb_cgroup_id_user Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore(a)bootlin.com> --- Alexis Lothoré (eBPF Foundation) (4): selftests/bpf: convert get_current_cgroup_id_user to test_progs selftests/bpf: convert test_cgroup_storage to test_progs selftests/bpf: add proper section name to bpf prog and rename it selftests/bpf: convert test_skb_cgroup_id_user to test_progs tools/testing/selftests/bpf/.gitignore | 3 - tools/testing/selftests/bpf/Makefile | 8 +- tools/testing/selftests/bpf/get_cgroup_id_user.c | 151 ----------------- .../selftests/bpf/prog_tests/cgroup_ancestor.c | 159 ++++++++++++++++++ .../bpf/prog_tests/cgroup_get_current_cgroup_id.c | 58 +++++++ .../selftests/bpf/prog_tests/cgroup_storage.c | 65 ++++++++ ...test_skb_cgroup_id_kern.c => cgroup_ancestor.c} | 2 +- tools/testing/selftests/bpf/progs/cgroup_storage.c | 24 +++ tools/testing/selftests/bpf/test_cgroup_storage.c | 174 -------------------- tools/testing/selftests/bpf/test_skb_cgroup_id.sh | 63 ------- .../selftests/bpf/test_skb_cgroup_id_user.c | 183 --------------------- 11 files changed, 309 insertions(+), 581 deletions(-) --- base-commit: 0e2eaf4b33f65e904b69bae6b956f3f610dbba9a change-id: 20240725-convert_cgroup_tests-d07c66053225 Best regards, -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

1 year

3
18
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[PATCH v2 0/3] KVM: selftests: arm64: Make use of sysreg defintions in get-reg-list

by Mark Brown

The system register definitions in the arm64 get-reg-list are all done with directly specified magic numbers rather than using the definitions we import from the main kernel. This is error prone, and requires us to audit the additions to get-reg-list separately to what we do when specifying the registers for the main kernel. Since Marc has indicated that this isn't a deliberate or desired choice let's start using the constants we have defined. We first manually update the data used to filter registers based on ID register fields to use a simplified macro that specifies the register and ID field in a muc more compact fashion. This is done first since there is an error in the ID register field for the S1PIE registers. We then replace all the remaining named system register specifications with use of the existing KVM_ARM64_SYS_REG() macro. This is just a first step, there's a bunch more work we could be doing here, the main thing being making use of the encodings in arch/arm64/tools/sysreg to convert more of the registers (including updating as more registers are converted to use the generator). Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v2: - Add use of designated initalisers when converting filtering macros. - Manual handling of CNTV_CTL_EL0 and CNTV_CVAL_EL0. - Commit message tweaks. - Link to v1: https://lore.kernel.org/r/20240802-kvm-arm64-get-reg-list-v1-0-3a5bf8f80765… --- Mark Brown (3): KVM: selftests: arm64: Simplify specification of filtered registers KVM: selftests: arm64: Use symbolic definitions for incorrect encodings KVM: selftests: arm64: Use generated defines for named system registers tools/testing/selftests/kvm/aarch64/get-reg-list.c | 244 ++++++++++----------- 1 file changed, 122 insertions(+), 122 deletions(-) --- base-commit: 8400291e289ee6b2bf9779ff1c83a291501f017b change-id: 20240802-kvm-arm64-get-reg-list-a86a37460bdd Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

1
3
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[PATCH] selftest/perf: Add perf-test to perform perf testcase

by Jeremy Szu

The perf test supports testing many functions and includes a way to detect the prerequisites for each test case. Add a script to launch the perf test. Signed-off-by: Jeremy Szu <jszu(a)nvidia.com> --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/perf/Makefile | 5 ++++ tools/testing/selftests/perf/perf_test.sh | 30 +++++++++++++++++++++++ tools/testing/selftests/perf/settings | 1 + 4 files changed, 37 insertions(+) create mode 100644 tools/testing/selftests/perf/Makefile create mode 100755 tools/testing/selftests/perf/perf_test.sh create mode 100644 tools/testing/selftests/perf/settings diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 9039f3709affb..7598dd39cad28 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -67,6 +67,7 @@ TARGETS += net/openvswitch TARGETS += net/tcp_ao TARGETS += net/netfilter TARGETS += nsfs +TARGETS += perf TARGETS += perf_events TARGETS += pidfd TARGETS += pid_namespace diff --git a/tools/testing/selftests/perf/Makefile b/tools/testing/selftests/perf/Makefile new file mode 100644 index 0000000000000..72d90c71ab290 --- /dev/null +++ b/tools/testing/selftests/perf/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 + +TEST_PROGS := perf_test.sh + +include ../lib.mk diff --git a/tools/testing/selftests/perf/perf_test.sh b/tools/testing/selftests/perf/perf_test.sh new file mode 100755 index 0000000000000..ee78b4f9906cd --- /dev/null +++ b/tools/testing/selftests/perf/perf_test.sh @@ -0,0 +1,30 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +skip() { + echo "SKIP: $1" + exit 4 +} + +fail() { + echo "FAIL: $1" + exit 255 +} + +if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then + [ "$(id -u)" -ne 0 ] && \ + skip "this test must be run as root." + which perf >/dev/null 2>&1 || \ + skip "perf is not installed." + + cmd_output=$(perf test -vv 2>&1) + perf_ret=$? + + if [ $perf_ret -ne 0 ]; then + (IFS='\n'; echo $cmd_output) + fail "perf command returns non-zero." + elif [[ $cmd_output == *"FAILED!"* ]]; then + (IFS='\n'; echo $cmd_output) + fail "perf test got FAILED!" + fi +fi diff --git a/tools/testing/selftests/perf/settings b/tools/testing/selftests/perf/settings new file mode 100644 index 0000000000000..a62d2fa1275c6 --- /dev/null +++ b/tools/testing/selftests/perf/settings @@ -0,0 +1 @@ +timeout=600 -- 2.34.1

1 year

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[PATCH 0/2] KVM: selftests: arm64: Make use of sysreg defintions in get-reg-list

by Mark Brown

The system register definitions in the arm64 get-reg-list are all done with directly specified magic numbers rather than using the definitions we import from the main kernel. This is error prone, and requires us to audit the additions to get-reg-list separately to what we do when specifying the registers for the main kernel. Since Marc has indicated that this isn't a deliberate or desired choice let's start using the constants we have defined. We first manually update the data used to filter registers based on ID register fields to use a simplified macro that specifies the register and ID field in a muc more compact fashion. This is done first since there is an error in the ID register field for the S1PIE registers. We then replace all the remaining named system register specifications with use of the existing KVM_ARM64_SYS_REG() macro. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Mark Brown (2): KVM: selftests: arm64: Simplify specification of filtered registers KVM: selftests: arm64: Use generated defines for named system registers tools/testing/selftests/kvm/aarch64/get-reg-list.c | 237 ++++++++++----------- 1 file changed, 115 insertions(+), 122 deletions(-) --- base-commit: 8400291e289ee6b2bf9779ff1c83a291501f017b change-id: 20240802-kvm-arm64-get-reg-list-a86a37460bdd Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

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[PATCH] kunit: Fix kunit_kstrdup_const() with modules

by David Gow

In commit 7d3c33b290b1 ("kunit: Device wrappers should also manage driver name"), the kunit_kstrdup_const() and kunit_kfree_const() were introduced as an optimisation of kunit_kstrdup(), which only copy/free strings from the kernel rodata. However, these are inline functions, and is_kernel_rodata() only works for built-in code. This causes problems in two cases: - If kunit is built as a module, __{start,end}_rodata is not defined. - If a kunit test using these functions is built as a module, it will suffer the same fate. Restrict the is_kernel_rodata() case to when KUnit is built as a module, which fixes the first case, at the cost of losing the optimisation. Also, make kunit_{kstrdup,kfree}_const non-inline, so that other modules using them will not accidentally depend on is_kernel_rodata(). If KUnit is built-in, they'll benefit from the optimisation, if KUnit is not, they won't, but the string will be properly duplicated. (And fix a couple of typos in the doc comment, too.) Reported-by: Nico Pache <npache(a)redhat.com> Closes: https://lore.kernel.org/all/CAA1CXcDKht4vOL-acxrARbm6JhGna8_k8wjYJ-vHONink8… Fixes: 7d3c33b290b1 ("kunit: Device wrappers should also manage driver name") Signed-off-by: David Gow <davidgow(a)google.com> --- include/kunit/test.h | 16 +++------------- lib/kunit/test.c | 19 +++++++++++++++++++ 2 files changed, 22 insertions(+), 13 deletions(-) diff --git a/include/kunit/test.h b/include/kunit/test.h index da9e84de14c0..5ac237c949a0 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -489,11 +489,7 @@ static inline void *kunit_kcalloc(struct kunit *test, size_t n, size_t size, gfp * Calls kunit_kfree() only if @x is not in .rodata section. * See kunit_kstrdup_const() for more information. */ -static inline void kunit_kfree_const(struct kunit *test, const void *x) -{ - if (!is_kernel_rodata((unsigned long)x)) - kunit_kfree(test, x); -} +void kunit_kfree_const(struct kunit *test, const void *x); /** * kunit_kstrdup() - Duplicates a string into a test managed allocation. @@ -527,16 +523,10 @@ static inline char *kunit_kstrdup(struct kunit *test, const char *str, gfp_t gfp * @gfp: flags passed to underlying kmalloc(). * * Calls kunit_kstrdup() only if @str is not in the rodata section. Must be freed with - * kunit_free_const() -- not kunit_free(). + * kunit_kfree_const() -- not kunit_kfree(). * See kstrdup_const() and kunit_kmalloc_array() for more information. */ -static inline const char *kunit_kstrdup_const(struct kunit *test, const char *str, gfp_t gfp) -{ - if (is_kernel_rodata((unsigned long)str)) - return str; - - return kunit_kstrdup(test, str, gfp); -} +const char *kunit_kstrdup_const(struct kunit *test, const char *str, gfp_t gfp); /** * kunit_vm_mmap() - Allocate KUnit-tracked vm_mmap() area diff --git a/lib/kunit/test.c b/lib/kunit/test.c index e8b1b52a19ab..089c832e3cdb 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -874,6 +874,25 @@ void kunit_kfree(struct kunit *test, const void *ptr) } EXPORT_SYMBOL_GPL(kunit_kfree); +void kunit_kfree_const(struct kunit *test, const void *x) +{ +#if !IS_MODULE(CONFIG_KUNIT) + if (!is_kernel_rodata((unsigned long)x)) +#endif + kunit_kfree(test, x); +} +EXPORT_SYMBOL_GPL(kunit_kfree_const); + +const char *kunit_kstrdup_const(struct kunit *test, const char *str, gfp_t gfp) +{ +#if !IS_MODULE(CONFIG_KUNIT) + if (is_kernel_rodata((unsigned long)str)) + return str; +#endif + return kunit_kstrdup(test, str, gfp); +} +EXPORT_SYMBOL_GPL(kunit_kstrdup_const); + void kunit_cleanup(struct kunit *test) { struct kunit_resource *res; -- 2.46.0.rc2.264.g509ed76dc8-goog

1 year

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[PATCH] kunit: Device wrappers should also manage driver name

by David Gow

kunit_driver_create() accepts a name for the driver, but does not copy it, so if that name is either on the stack, or otherwise freed, we end up with a use-after-free when the driver is cleaned up. Instead, strdup() the name, and manage it as another KUnit allocation. As there was no existing kunit_kstrdup(), we add one. Further, add a kunit_ variant of strdup_const() and kfree_const(), so we don't need to allocate and manage the string in the majority of cases where it's a constant. This fixes a KASAN splat with overflow.overflow_allocation_test, when built as a module. Fixes: d03c720e03bd ("kunit: Add APIs for managing devices") Reported-by: Nico Pache <npache(a)redhat.com> Closes: https://groups.google.com/g/kunit-dev/c/81V9b9QYON0 Signed-off-by: David Gow <davidgow(a)google.com> Reviewed-by: Kees Cook <kees(a)kernel.org> --- There's some more serious changes since the RFC I sent, so please take a closer look. Thanks, -- David Changes since RFC: https://groups.google.com/g/kunit-dev/c/81V9b9QYON0/m/PFKNKDKAAAAJ - Add and use the kunit_kstrdup_const() and kunit_free_const() functions. - Fix a typo in the doc comments. --- include/kunit/test.h | 58 ++++++++++++++++++++++++++++++++++++++++++++ lib/kunit/device.c | 7 ++++-- 2 files changed, 63 insertions(+), 2 deletions(-) diff --git a/include/kunit/test.h b/include/kunit/test.h index e2a1f0928e8b..da9e84de14c0 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -28,6 +28,7 @@ #include <linux/types.h> #include <asm/rwonce.h> +#include <asm/sections.h> /* Static key: true if any KUnit tests are currently running */ DECLARE_STATIC_KEY_FALSE(kunit_running); @@ -480,6 +481,63 @@ static inline void *kunit_kcalloc(struct kunit *test, size_t n, size_t size, gfp return kunit_kmalloc_array(test, n, size, gfp | __GFP_ZERO); } + +/** + * kunit_kfree_const() - conditionally free test managed memory + * @x: pointer to the memory + * + * Calls kunit_kfree() only if @x is not in .rodata section. + * See kunit_kstrdup_const() for more information. + */ +static inline void kunit_kfree_const(struct kunit *test, const void *x) +{ + if (!is_kernel_rodata((unsigned long)x)) + kunit_kfree(test, x); +} + +/** + * kunit_kstrdup() - Duplicates a string into a test managed allocation. + * + * @test: The test context object. + * @str: The NULL-terminated string to duplicate. + * @gfp: flags passed to underlying kmalloc(). + * + * See kstrdup() and kunit_kmalloc_array() for more information. + */ +static inline char *kunit_kstrdup(struct kunit *test, const char *str, gfp_t gfp) +{ + size_t len; + char *buf; + + if (!str) + return NULL; + + len = strlen(str) + 1; + buf = kunit_kmalloc(test, len, gfp); + if (buf) + memcpy(buf, str, len); + return buf; +} + +/** + * kunit_kstrdup_const() - Conditionally duplicates a string into a test managed allocation. + * + * @test: The test context object. + * @str: The NULL-terminated string to duplicate. + * @gfp: flags passed to underlying kmalloc(). + * + * Calls kunit_kstrdup() only if @str is not in the rodata section. Must be freed with + * kunit_free_const() -- not kunit_free(). + * See kstrdup_const() and kunit_kmalloc_array() for more information. + */ +static inline const char *kunit_kstrdup_const(struct kunit *test, const char *str, gfp_t gfp) +{ + if (is_kernel_rodata((unsigned long)str)) + return str; + + return kunit_kstrdup(test, str, gfp); +} + /** * kunit_vm_mmap() - Allocate KUnit-tracked vm_mmap() area * @test: The test context object. diff --git a/lib/kunit/device.c b/lib/kunit/device.c index 25c81ed465fb..520c1fccee8a 100644 --- a/lib/kunit/device.c +++ b/lib/kunit/device.c @@ -89,7 +89,7 @@ struct device_driver *kunit_driver_create(struct kunit *test, const char *name) if (!driver) return ERR_PTR(err); - driver->name = name; + driver->name = kunit_kstrdup_const(test, name, GFP_KERNEL); driver->bus = &kunit_bus_type; driver->owner = THIS_MODULE; @@ -192,8 +192,11 @@ void kunit_device_unregister(struct kunit *test, struct device *dev) const struct device_driver *driver = to_kunit_device(dev)->driver; kunit_release_action(test, device_unregister_wrapper, dev); - if (driver) + if (driver) { + const char *driver_name = driver->name; kunit_release_action(test, driver_unregister_wrapper, (void *)driver); + kunit_kfree_const(test, driver_name); + } } EXPORT_SYMBOL_GPL(kunit_device_unregister); -- 2.46.0.rc1.232.g9752f9e123-goog

1 year

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[PATCH RFC 0/5] mm/gup: Introduce exclusive GUP pinning

by Elliot Berman

In arm64 pKVM and QuIC's Gunyah protected VM model, we want to support grabbing shmem user pages instead of using KVM's guestmemfd. These hypervisors provide a different isolation model than the CoCo implementations from x86. KVM's guest_memfd is focused on providing memory that is more isolated than AVF requires. Some specific examples include ability to pre-load data onto guest-private pages, dynamically sharing/isolating guest pages without copy, and (future) migrating guest-private pages. In sum of those differences after a discussion in [1] and at PUCK, we want to try to stick with existing shmem and extend GUP to support the isolation needs for arm64 pKVM and Gunyah. To that end, we introduce the concept of "exclusive GUP pinning", which enforces that only one pin of any kind is allowed when using the FOLL_EXCLUSIVE flag is set. This behavior doesn't affect FOLL_GET or any other folio refcount operations that don't go through the FOLL_PIN path. [1]: https://lore.kernel.org/all/20240319143119.GA2736@willie-the-truck/ Tree with patches at: https://git.codelinaro.org/clo/linux-kernel/gunyah-linux/-/tree/sent/exclus… anup(a)brainfault.org, paul.walmsley(a)sifive.com, palmer(a)dabbelt.com, aou(a)eecs.berkeley.edu, seanjc(a)google.com, viro(a)zeniv.linux.org.uk, brauner(a)kernel.org, willy(a)infradead.org, akpm(a)linux-foundation.org, xiaoyao.li(a)intel.com, yilun.xu(a)intel.com, chao.p.peng(a)linux.intel.com, jarkko(a)kernel.org, amoorthy(a)google.com, dmatlack(a)google.com, yu.c.zhang(a)linux.intel.com, isaku.yamahata(a)intel.com, mic(a)digikod.net, vbabka(a)suse.cz, vannapurve(a)google.com, ackerleytng(a)google.com, mail(a)maciej.szmigiero.name, david(a)redhat.com, michael.roth(a)amd.com, wei.w.wang(a)intel.com, liam.merwick(a)oracle.com, isaku.yamahata(a)gmail.com, kirill.shutemov(a)linux.intel.com, suzuki.poulose(a)arm.com, steven.price(a)arm.com, quic_eberman(a)quicinc.com, quic_mnalajal(a)quicinc.com, quic_tsoni(a)quicinc.com, quic_svaddagi(a)quicinc.com, quic_cvanscha(a)quicinc.com, quic_pderrin(a)quicinc.com, quic_pheragu(a)quicinc.com, catalin.marinas(a)arm.com, james.morse(a)arm.com, yuzenghui(a)huawei.com, oliver.upton(a)linux.dev, maz(a)kernel.org, will(a)kernel.org, qperret(a)google.com, keirf(a)google.com, tabba(a)google.com Signed-off-by: Elliot Berman <quic_eberman(a)quicinc.com> --- Elliot Berman (2): mm/gup-test: Verify exclusive pinned mm/gup_test: Verify GUP grabs same pages twice Fuad Tabba (3): mm/gup: Move GUP_PIN_COUNTING_BIAS to page_ref.h mm/gup: Add an option for obtaining an exclusive pin mm/gup: Add support for re-pinning a normal pinned page as exclusive include/linux/mm.h | 57 ++++---- include/linux/mm_types.h | 2 + include/linux/page_ref.h | 74 ++++++++++ mm/Kconfig | 5 + mm/gup.c | 265 ++++++++++++++++++++++++++++++---- mm/gup_test.c | 108 ++++++++++++++ mm/gup_test.h | 1 + tools/testing/selftests/mm/gup_test.c | 5 +- 8 files changed, 457 insertions(+), 60 deletions(-) --- base-commit: 6ba59ff4227927d3a8530fc2973b80e94b54d58f change-id: 20240509-exclusive-gup-66259138bbff Best regards, -- Elliot Berman <quic_eberman(a)quicinc.com>

1 year

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[GIT PULL] Kselftest fixes update for Linux 6.11-rc3

by Shuah Khan

Hi Linus, Please pull the kselftest fixes update for Linux 6.11-rc3. This kselftest fixes update consists of a single fix to the conditional in ksft.py script which incorrectly flags a test suite failed when there are skipped tests in the mix. The logic is fixed to take skipped tests into account and report the test as passed. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit 8400291e289ee6b2bf9779ff1c83a291501f017b: Linux 6.11-rc1 (2024-07-28 14:19:55 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux_kselftest-fixes-6.11-rc3 for you to fetch changes up to 170c966cbe274e664288cfc12ee919d5e706dc50: selftests: ksft: Fix finished() helper exit code on skipped tests (2024-07-31 11:38:56 -0600) ---------------------------------------------------------------- linux_kselftest-fixes-6.11-rc3 This kselftest fixes update consists of a single fix to the conditional in ksft.py script which incorrectly flags a test suite failed when there are skipped tests in the mix. The logic is fixed to take skipped tests into account and report the test as passed. ---------------------------------------------------------------- Laura Nao (1): selftests: ksft: Fix finished() helper exit code on skipped tests tools/testing/selftests/kselftest/ksft.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) ----------------------------------------------------------------

1 year

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[PATCH v2] kselftest/devices/probe: Fix SyntaxWarning in regex strings for Python 3

by Alessandro Zanni

Insert raw strings to prevent Python3 from interpreting string literals as Unicode strings and, consequently, '\d' as an invalid escaped sequence. Avoid the 'SyntaxWarning: invalid escape sequence '\d'' warning for Python versions greater than 3.6. Fixes: dacf1d7a78bf ("kselftest: Add test to verify probe of devices from discoverable buses") Reviewed-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com> Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- Notes: v2: Imperative mode description for the inserted changes, added previous commit tag fixed by this patch .../selftests/devices/probe/test_discoverable_devices.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/devices/probe/test_discoverable_devices.py b/tools/testing/selftests/devices/probe/test_discoverable_devices.py index d94a74b8a054..d7a2bb91c807 100755 --- a/tools/testing/selftests/devices/probe/test_discoverable_devices.py +++ b/tools/testing/selftests/devices/probe/test_discoverable_devices.py @@ -45,7 +45,7 @@ def find_pci_controller_dirs(): def find_usb_controller_dirs(): - usb_controller_sysfs_dir = "usb[\d]+" + usb_controller_sysfs_dir = r"usb[\d]+" dir_regex = re.compile(usb_controller_sysfs_dir) for d in os.scandir(sysfs_usb_devices): @@ -91,7 +91,7 @@ def get_acpi_uid(sysfs_dev_dir): def get_usb_version(sysfs_dev_dir): - re_usb_version = re.compile("PRODUCT=.*/(\d)/.*") + re_usb_version = re.compile(r"PRODUCT=.*/(\d)/.*") with open(os.path.join(sysfs_dev_dir, "uevent")) as f: return int(re_usb_version.search(f.read()).group(1)) -- 2.43.0

1 year

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[PATCH v3] Kunit to check the longest symbol length

by Sergio González Collado

The longest length of a symbol (KSYM_NAME_LEN) was increased to 512 in the reference [1]. This patch adds a kunit test to check the longest symbol length. [1] https://lore.kernel.org/lkml/20220802015052.10452-6-ojeda@kernel.org/ Tested-by: Martin Rodriguez Reboredo <yakoyoku(a)gmail.com> Signed-off-by: Sergio González Collado <sergio.collado(a)gmail.com> --- V1 -> V2: corrected CI tests. Added fix proposed at [2] [2] https://lore.kernel.org/lkml/Y9ES4UKl%2F+DtvAVS@gmail.com/T/#m3ef0e12bb834d… --- V2 -> V3: updated base and added MODULE_DESCRIPTION() and MODULE_AUTHOR() --- arch/x86/tools/insn_decoder_test.c | 3 +- lib/Kconfig.debug | 9 +++ lib/Makefile | 2 + lib/longest_symbol_kunit.c | 124 +++++++++++++++++++++++++++++ 4 files changed, 137 insertions(+), 1 deletion(-) create mode 100644 lib/longest_symbol_kunit.c diff --git a/arch/x86/tools/insn_decoder_test.c b/arch/x86/tools/insn_decoder_test.c index 472540aeabc2..3bde35ea4188 100644 --- a/arch/x86/tools/insn_decoder_test.c +++ b/arch/x86/tools/insn_decoder_test.c @@ -10,6 +10,7 @@ #include <assert.h> #include <unistd.h> #include <stdarg.h> +#include <linux/kallsysms.h> #define unlikely(cond) (cond) @@ -106,7 +107,7 @@ static void parse_args(int argc, char **argv) } } -#define BUFSIZE 256 +#define BUFSIZE (256 + KSYM_NAME_LEN) int main(int argc, char **argv) { diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index a30c03a66172..4587466f7d07 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2783,6 +2783,15 @@ config FORTIFY_KUNIT_TEST by the str*() and mem*() family of functions. For testing runtime traps of FORTIFY_SOURCE, see LKDTM's "FORTIFY_*" tests. +config LONGEST_SYM_KUNIT_TEST + tristate "Test the longest symbol possible" if !KUNIT_ALL_TESTS + depends on KUNIT && KPROBES + default KUNIT_ALL_TESTS + help + Tests the longest symbol possible + + If unsure, say N. + config HW_BREAKPOINT_KUNIT_TEST bool "Test hw_breakpoint constraints accounting" if !KUNIT_ALL_TESTS depends on HAVE_HW_BREAKPOINT diff --git a/lib/Makefile b/lib/Makefile index 322bb127b4dc..4241807025b8 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -388,6 +388,8 @@ CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN) obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o obj-$(CONFIG_USERCOPY_KUNIT_TEST) += usercopy_kunit.o +obj-$(CONFIG_LONGEST_SYM_KUNIT_TEST) += longest_symbol_kunit.o +CFLAGS_longest_symbol_kunit.o += $(call cc-disable-warning, missing-prototypes) obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o diff --git a/lib/longest_symbol_kunit.c b/lib/longest_symbol_kunit.c new file mode 100644 index 000000000000..557ad6eae56c --- /dev/null +++ b/lib/longest_symbol_kunit.c @@ -0,0 +1,124 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Test the longest symbol length. Execute with: + * ./tools/testing/kunit/kunit.py run longest-symbol + * --arch=x86_64 --kconfig_add CONFIG_KPROBES=y --kconfig_add CONFIG_MODULES=y + * --kconfig_add CONFIG_RETPOLINE=n + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <kunit/test.h> +#include <linux/stringify.h> +#include <linux/kprobes.h> +#include <linux/kallsyms.h> + +#define DI(name) s##name##name +#define DDI(name) DI(n##name##name) +#define DDDI(name) DDI(n##name##name) +#define DDDDI(name) DDDI(n##name##name) +#define DDDDDI(name) DDDDI(n##name##name) + +#define PLUS1(name) __PASTE(name, e) + +/*Generate a symbol whose name length is 511 */ +#define LONGEST_SYM_NAME DDDDDI(g1h2i3j4k5l6m7n) + +/*Generate a symbol whose name length is 512 */ +#define LONGEST_SYM_NAME_PLUS1 PLUS1(LONGEST_SYM_NAME) + +#define RETURN_LONGEST_SYM 0xAAAAA +#define RETURN_LONGEST_SYM_PLUS1 0x55555 + +noinline int LONGEST_SYM_NAME(void); +noinline int LONGEST_SYM_NAME(void) +{ + return RETURN_LONGEST_SYM; +} + +noinline int LONGEST_SYM_NAME_PLUS1(void); +noinline int LONGEST_SYM_NAME_PLUS1(void) +{ + return RETURN_LONGEST_SYM_PLUS1; +} + +_Static_assert(sizeof(__stringify(LONGEST_SYM_NAME)) == KSYM_NAME_LEN, +"Incorrect symbol length found. Expected KSYM_NAME_LEN: " +__stringify(KSYM_NAME) ", but found: " +__stringify(sizeof(LONGEST_SYM_NAME))); + +static void test_longest_symbol(struct kunit *test) +{ + KUNIT_EXPECT_EQ(test, RETURN_LONGEST_SYM, LONGEST_SYM_NAME()); +}; + +static void test_longest_symbol_kallsyms(struct kunit *test) +{ + unsigned long (*kallsyms_lookup_name)(const char *name); + static int (*longest_sym)(void); + + struct kprobe kp = { + .symbol_name = "kallsyms_lookup_name", + }; + + if (register_kprobe(&kp) < 0) { + pr_info("%s: kprobe not registered\n", __func__); + KUNIT_FAIL(test, "test_longest_symbol kallsysms: kprobe not registered\n"); + return; + } + + kunit_warn(test, "test_longest_symbol kallsyms: kprobe registered\n"); + kallsyms_lookup_name = (unsigned long (*)(const char *name))kp.addr; + unregister_kprobe(&kp); + + longest_sym = + (void *) kallsyms_lookup_name(__stringify(LONGEST_SYM_NAME)); + KUNIT_EXPECT_EQ(test, RETURN_LONGEST_SYM, longest_sym()); +}; + +static void test_longest_symbol_plus1(struct kunit *test) +{ + KUNIT_EXPECT_EQ(test, RETURN_LONGEST_SYM_PLUS1, LONGEST_SYM_NAME_PLUS1()); +}; + +static void test_longest_symbol_plus1_kallsyms(struct kunit *test) +{ + unsigned long (*kallsyms_lookup_name)(const char *name); + static int (*longest_sym_plus1)(void); + + struct kprobe kp = { + .symbol_name = "kallsyms_lookup_name", + }; + + if (register_kprobe(&kp) < 0) { + pr_info("%s: kprobe not registered\n", __func__); + KUNIT_FAIL(test, "test_longest_symbol kallsysms: kprobe not registered\n"); + return; + } + + kunit_warn(test, "test_longest_symbol_plus1 kallsyms: kprobe registered\n"); + kallsyms_lookup_name = (unsigned long (*)(const char *name))kp.addr; + unregister_kprobe(&kp); + + longest_sym_plus1 = + (void *) kallsyms_lookup_name(__stringify(LONGEST_SYM_NAME_PLUS1)); + KUNIT_EXPECT_NULL(test, longest_sym_plus1); +}; + +static struct kunit_case longest_symbol_test_cases[] = { + KUNIT_CASE(test_longest_symbol), + KUNIT_CASE(test_longest_symbol_kallsyms), + KUNIT_CASE(test_longest_symbol_plus1), + KUNIT_CASE(test_longest_symbol_plus1_kallsyms), + {} +}; + +static struct kunit_suite longest_symbol_test_suite = { + .name = "longest-symbol", + .test_cases = longest_symbol_test_cases, +}; +kunit_test_suite(longest_symbol_test_suite); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Test the longest symbol length"); +MODULE_AUTHOR("Sergio González Collado"); base-commit: de9c2c66ad8e787abec7c9d7eff4f8c3cdd28aed -- 2.39.2

1 year

1
0
0 0

[PATCH-cgroup 0/5] cgroup/cpuset: Miscellaneous cpuset updates for 6.12

by Waiman Long

The first 2 patches in this series fix cpuset bugs found by Chen Ridong. Patch 3 streamlines the sched domain rebuild process for hotplug operation and eliminates the use of intermediate cpuset states for sched domain generation. Patch 4 modifies generate_sched_domains() to check the correctness of partition roots with non-overlapping CPUs. Patch 5 adds new test cases to cover the bugs fixed in patches 1 and 2. Chen Ridong (1): cgroup/cpuset: fix panic caused by partcmd_update Waiman Long (4): cgroup/cpuset: Clear effective_xcpus on cpus_allowed clearing only if cpus.exclusive not set cgroup/cpuset: Eliminate unncessary sched domains rebuilds in hotplug cgroup/cpuset: Check for partition roots with overlapping CPUs selftest/cgroup: Add new test cases to test_cpuset_prs.sh kernel/cgroup/cpuset.c | 70 ++++++++++--------- .../selftests/cgroup/test_cpuset_prs.sh | 12 +++- 2 files changed, 49 insertions(+), 33 deletions(-) -- 2.43.5

1 year

2
8
0 0

[PATCH net-next] selftests: net: py: support verbose printing, display executed commands

by Mohsin Bashir

Add verbosity support to show the commands executed while running tests. Enable verbosity if either an environment variable 'VERBOSE' is set to a non-zero number or it is defined in a config file under driver tests as discussed here: https://github.com/linux-netdev/nipa/wiki/Running-driver-tests. Signed-off-by: Mohsin Bashir <mohsin.bashr(a)gmail.com> --- tools/testing/selftests/drivers/net/lib/py/env.py | 14 +++++++++++++- tools/testing/selftests/net/lib/py/__init__.py | 7 +++++++ tools/testing/selftests/net/lib/py/utils.py | 14 ++++++++++++++ 3 files changed, 34 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/lib/py/env.py b/tools/testing/selftests/drivers/net/lib/py/env.py index a5e800b8f103..ec53cf59e104 100644 --- a/tools/testing/selftests/drivers/net/lib/py/env.py +++ b/tools/testing/selftests/drivers/net/lib/py/env.py @@ -4,7 +4,7 @@ import os import time from pathlib import Path from lib.py import KsftSkipEx, KsftXfailEx -from lib.py import cmd, ethtool, ip +from lib.py import cmd, ethtool, ip, verbosity_ctl from lib.py import NetNS, NetdevSimDev from .remote import Remote @@ -42,6 +42,12 @@ class NetDrvEnv: self.env = _load_env_file(src_path) + try: + verbosity_ctl(level=int(self.env.get('VERBOSE', 0))) + except ValueError as e: + print(f'Ignoring \'VERBOSE\'. Unknown value \'{self.env.get("VERBOSE")}\'') + verbosity_ctl(level=0) + if 'NETIF' in self.env: self.dev = ip("link show dev " + self.env['NETIF'], json=True)[0] else: @@ -92,6 +98,12 @@ class NetDrvEpEnv: self._ns = None self._ns_peer = None + try: + verbosity_ctl(level=int(self.env.get('VERBOSE', 0))) + except ValueError as e: + print(f'Ignoring \'VERBOSE\'. Unknown value \'{self.env.get("VERBOSE")}\'') + verbosity_ctl(level=0) + if "NETIF" in self.env: if nsim_test is True: raise KsftXfailEx("Test only works on netdevsim") diff --git a/tools/testing/selftests/net/lib/py/__init__.py b/tools/testing/selftests/net/lib/py/__init__.py index b6d498d125fe..1541079fadce 100644 --- a/tools/testing/selftests/net/lib/py/__init__.py +++ b/tools/testing/selftests/net/lib/py/__init__.py @@ -1,8 +1,15 @@ # SPDX-License-Identifier: GPL-2.0 +import os from .consts import KSRC from .ksft import * from .netns import NetNS from .nsim import * from .utils import * from .ynl import NlError, YnlFamily, EthtoolFamily, NetdevFamily, RtnlFamily + +try: + verbosity_ctl(level=int(os.environ.get('VERBOSE', 0))) +except ValueError as e: + print(f'Ignoring \'VERBOSE\'. Unknown value \'{os.environ.get("VERBOSE")}\'') + verbosity_ctl(level=0) diff --git a/tools/testing/selftests/net/lib/py/utils.py b/tools/testing/selftests/net/lib/py/utils.py index 72590c3f90f1..4a59958649be 100644 --- a/tools/testing/selftests/net/lib/py/utils.py +++ b/tools/testing/selftests/net/lib/py/utils.py @@ -9,6 +9,18 @@ import subprocess import time +def verbosity_ctl(level=None): + global VERBOSITY_LEVEL + if level is not None: + VERBOSITY_LEVEL = level + return VERBOSITY_LEVEL + + +def verbose(*objs, **kwargs): + if verbosity_ctl() >= 1: + print(*objs, **kwargs) + + class CmdExitFailure(Exception): pass @@ -22,6 +34,8 @@ class cmd: self.stderr = None self.ret = None + verbose("#cmd|", comm) + self.comm = comm if host: self.proc = host.cmd(comm) -- 2.43.0

1 year

2
3
0 0

[PATCH 00/12] tools/nolibc: improve LLVM/clang support

by Thomas Weißschuh

The current support for LLVM and clang in nolibc and its testsuite is very limited. * Various architectures plain do not compile * The user *has* to specify "-Os" otherwise the program crashes * Cross-compilation of the tests does not work * Using clang is not wired up in run-tests.sh This series extends this support. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- Thomas Weißschuh (12): tools/nolibc: use clang-compatible asm syntax in arch-arm.h tools/nolibc: limit powerpc stack-protector workaround to GCC tools/nolibc: move entrypoint specifics to compiler.h tools/nolibc: use attribute((naked)) if available selftests/nolibc: report failure if no testcase passed selftests/nolibc: avoid passing NULL to printf("%s") selftests/nolibc: determine $(srctree) first selftests/nolibc: setup objtree without Makefile.include selftests/nolibc: add support for LLVM= parameter selftests/nolibc: add cc-option compatible with clang cross builds selftests/nolibc: run-tests.sh: avoid overwriting CFLAGS_EXTRA selftests/nolibc: run-tests.sh: allow building through LLVM tools/include/nolibc/arch-aarch64.h | 4 ++-- tools/include/nolibc/arch-arm.h | 8 ++++---- tools/include/nolibc/arch-i386.h | 4 ++-- tools/include/nolibc/arch-loongarch.h | 4 ++-- tools/include/nolibc/arch-mips.h | 4 ++-- tools/include/nolibc/arch-powerpc.h | 6 +++--- tools/include/nolibc/arch-riscv.h | 4 ++-- tools/include/nolibc/arch-s390.h | 4 ++-- tools/include/nolibc/arch-x86_64.h | 4 ++-- tools/include/nolibc/compiler.h | 12 ++++++++++++ tools/testing/selftests/nolibc/Makefile | 27 ++++++++++++++++----------- tools/testing/selftests/nolibc/nolibc-test.c | 4 ++-- tools/testing/selftests/nolibc/run-tests.sh | 20 ++++++++++++++++---- 13 files changed, 67 insertions(+), 38 deletions(-) --- base-commit: 0db287736bc586fcd5a2925518ef09eec6924803 change-id: 20240727-nolibc-llvm-3fad68590d4c Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

1 year

4
28
0 0

[PATCH] tools/nolibc: pass argc, argv and envp to constructors

by Thomas Weißschuh

Mirror glibc behavior for compatibility. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- tools/include/nolibc/crt.h | 23 ++++++++++++----------- tools/testing/selftests/nolibc/nolibc-test.c | 5 +++-- 2 files changed, 15 insertions(+), 13 deletions(-) diff --git a/tools/include/nolibc/crt.h b/tools/include/nolibc/crt.h index 43b551468c2a..ac291574f6c0 100644 --- a/tools/include/nolibc/crt.h +++ b/tools/include/nolibc/crt.h @@ -13,11 +13,11 @@ const unsigned long *_auxv __attribute__((weak)); static void __stack_chk_init(void); static void exit(int); -extern void (*const __preinit_array_start[])(void) __attribute__((weak)); -extern void (*const __preinit_array_end[])(void) __attribute__((weak)); +extern void (*const __preinit_array_start[])(int, char **, char**) __attribute__((weak)); +extern void (*const __preinit_array_end[])(int, char **, char**) __attribute__((weak)); -extern void (*const __init_array_start[])(void) __attribute__((weak)); -extern void (*const __init_array_end[])(void) __attribute__((weak)); +extern void (*const __init_array_start[])(int, char **, char**) __attribute__((weak)); +extern void (*const __init_array_end[])(int, char **, char**) __attribute__((weak)); extern void (*const __fini_array_start[])(void) __attribute__((weak)); extern void (*const __fini_array_end[])(void) __attribute__((weak)); @@ -29,7 +29,8 @@ void _start_c(long *sp) char **argv; char **envp; int exitcode; - void (* const *func)(void); + void (* const *ctor_func)(int, char **, char **); + void (* const *dtor_func)(void); const unsigned long *auxv; /* silence potential warning: conflicting types for 'main' */ int _nolibc_main(int, char **, char **) __asm__ ("main"); @@ -66,16 +67,16 @@ void _start_c(long *sp) ; _auxv = auxv; - for (func = __preinit_array_start; func < __preinit_array_end; func++) - (*func)(); - for (func = __init_array_start; func < __init_array_end; func++) - (*func)(); + for (ctor_func = __preinit_array_start; ctor_func < __preinit_array_end; ctor_func++) + (*ctor_func)(argc, argv, envp); + for (ctor_func = __init_array_start; ctor_func < __init_array_end; ctor_func++) + (*ctor_func)(argc, argv, envp); /* go to application */ exitcode = _nolibc_main(argc, argv, envp); - for (func = __fini_array_end; func > __fini_array_start;) - (*--func)(); + for (dtor_func = __fini_array_end; dtor_func > __fini_array_start;) + (*--dtor_func)(); exit(exitcode); } diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 093d0512f4c5..0800b10fc3f7 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -686,9 +686,10 @@ static void constructor1(void) } __attribute__((constructor)) -static void constructor2(void) +static void constructor2(int argc, char **argv, char **envp) { - constructor_test_value *= 2; + if (argc && argv && envp) + constructor_test_value *= 2; } int run_startup(int min, int max) --- base-commit: 0db287736bc586fcd5a2925518ef09eec6924803 change-id: 20240728-nolibc-constructor-args-68bf56ff7438 Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

1 year

3
2
0 0

[PATCH 0/2] tools/nolibc: add support for [v]sscanf()

by Thomas Weißschuh

The implementation is limited and only supports numeric arguments. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- Thomas Weißschuh (2): tools/nolibc: add support for [v]sscanf() Revert "selftests: kselftest: Fix build failure with NOLIBC" tools/include/nolibc/stdio.h | 93 ++++++++++++++++++++++++++++ tools/testing/selftests/kselftest.h | 5 -- tools/testing/selftests/nolibc/nolibc-test.c | 59 ++++++++++++++++++ 3 files changed, 152 insertions(+), 5 deletions(-) --- base-commit: ae1f550efc11eaf1496c431d9c6e784cb49124c5 change-id: 20240414-nolibc-scanf-f1db6930d0c6 Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

1 year

3
7
0 0

[PATCH v2] kunit: add test duration attribute

by Rae Moar

Add a new test duration attribute to print the duration of a test run. Example: KTAP version 1 # Subtest: memcpy # module: memcpy_kunit 1..4 # memcpy_large_test.speed: slow # memcpy_large_test.duration: 1.134787584s ok 1 memcpy_large_test ... This attribute is printed for each test (excluding parameterized tests). Add documentation for this new attribute to KUnit docs. In order to save the timespec64 object, add the ability to save a memory allocated object to the attributes framework. Signed-off-by: Rae Moar <rmoar(a)google.com> --- Changes v1->v2: - Change sprintf to kasprintf .../dev-tools/kunit/running_tips.rst | 7 +++ include/kunit/attributes.h | 5 ++ include/kunit/test.h | 1 + lib/kunit/attributes.c | 54 ++++++++++++++++++- lib/kunit/test.c | 25 +++++++-- 5 files changed, 86 insertions(+), 6 deletions(-) diff --git a/Documentation/dev-tools/kunit/running_tips.rst b/Documentation/dev-tools/kunit/running_tips.rst index bd689db6fdd2..a528d92e5d8f 100644 --- a/Documentation/dev-tools/kunit/running_tips.rst +++ b/Documentation/dev-tools/kunit/running_tips.rst @@ -446,3 +446,10 @@ This attribute indicates whether the test uses init data or functions. This attribute is automatically saved as a boolean and tests can also be filtered using this attribute. + +``duration`` + +This attribute indicates the length of time in seconds of the test execution. + +This attribute is automatically saved as a timespec64 and printed for each test +(excluding parameterized tests). diff --git a/include/kunit/attributes.h b/include/kunit/attributes.h index bc76a0b786d2..89ca54ef380d 100644 --- a/include/kunit/attributes.h +++ b/include/kunit/attributes.h @@ -18,6 +18,11 @@ struct kunit_attr_filter { char *input; }; +/* + * Frees all of a test's allocated attributes. + */ +void kunit_free_attr(void *test_or_suite, bool is_test); + /* * Returns the name of the filter's attribute. */ diff --git a/include/kunit/test.h b/include/kunit/test.h index ec61cad6b71d..dca78d9bd3f6 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -82,6 +82,7 @@ enum kunit_speed { /* Holds attributes for each test case and suite */ struct kunit_attributes { enum kunit_speed speed; + struct timespec64 *duration; }; /** diff --git a/lib/kunit/attributes.c b/lib/kunit/attributes.c index 2cf04cc09372..fd01d54e52d7 100644 --- a/lib/kunit/attributes.c +++ b/lib/kunit/attributes.c @@ -40,6 +40,7 @@ struct kunit_attr { int (*filter)(void *attr, const char *input, int *err); void *attr_default; enum print_ops print; + bool to_free; }; /* String Lists for enum Attributes */ @@ -79,8 +80,22 @@ static const char *attr_string_to_string(void *attr, bool *to_free) return (char *) attr; } +static const char *attr_duration_to_string(void *attr, bool *to_free) +{ + struct timespec64 *val = (struct timespec64 *)attr; + char *str = kasprintf(GFP_KERNEL, "%lld.%09lds", val->tv_sec, val->tv_nsec); + + *to_free = true; + return str; +} + /* Filter Methods */ +static int attr_default_filter(void *attr, const char *input, int *err) +{ + return false; +} + static const char op_list[] = "<>!="; /* @@ -246,8 +261,20 @@ static void *attr_is_init_get(void *test_or_suite, bool is_test) return ((void *) suite->is_init); } +static void *attr_duration_get(void *test_or_suite, bool is_test) +{ + struct kunit_case *test = is_test ? test_or_suite : NULL; + + if (test && !test->generate_params) + return ((void *) test->attr.duration); + else + return ((void *) NULL); +} + /* List of all Test Attributes */ +static struct timespec64 duration_default = {0, 0}; + static struct kunit_attr kunit_attr_list[] = { { .name = "speed", @@ -256,6 +283,7 @@ static struct kunit_attr kunit_attr_list[] = { .filter = attr_speed_filter, .attr_default = (void *)KUNIT_SPEED_NORMAL, .print = PRINT_ALWAYS, + .to_free = false, }, { .name = "module", @@ -264,6 +292,7 @@ static struct kunit_attr kunit_attr_list[] = { .filter = attr_string_filter, .attr_default = (void *)"", .print = PRINT_SUITE, + .to_free = false, }, { .name = "is_init", @@ -272,10 +301,33 @@ static struct kunit_attr kunit_attr_list[] = { .filter = attr_bool_filter, .attr_default = (void *)false, .print = PRINT_SUITE, + .to_free = false, + }, + { + .name = "duration", + .get_attr = attr_duration_get, + .to_string = attr_duration_to_string, + .filter = attr_default_filter, + .attr_default = (void *)(&duration_default), + .print = PRINT_ALWAYS, + .to_free = true, } }; -/* Helper Functions to Access Attributes */ +/* Helper Functions to Access/Free Attributes */ + +void kunit_free_attr(void *test_or_suite, bool is_test) +{ + int i; + void *attr; + + for (i = 0; i < ARRAY_SIZE(kunit_attr_list); i++) { + if (kunit_attr_list[i].to_free) { + attr = kunit_attr_list[i].get_attr(test_or_suite, is_test); + kfree(attr); + } + } +} const char *kunit_attr_filter_name(struct kunit_attr_filter filter) { diff --git a/lib/kunit/test.c b/lib/kunit/test.c index e8b1b52a19ab..0d18e4969015 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -376,11 +376,11 @@ static void kunit_run_case_check_speed(struct kunit *test, /* * Initializes and runs test case. Does not clean up or do post validations. */ -static void kunit_run_case_internal(struct kunit *test, +static struct timespec64 kunit_run_case_internal(struct kunit *test, struct kunit_suite *suite, struct kunit_case *test_case) { - struct timespec64 start, end; + struct timespec64 start, end, duration; if (suite->init) { int ret; @@ -389,7 +389,9 @@ static void kunit_run_case_internal(struct kunit *test, if (ret) { kunit_err(test, "failed to initialize: %d\n", ret); kunit_set_failure(test); - return; + duration.tv_sec = 0; + duration.tv_nsec = 0; + return duration; } } @@ -399,7 +401,11 @@ static void kunit_run_case_internal(struct kunit *test, ktime_get_ts64(&end); - kunit_run_case_check_speed(test, test_case, timespec64_sub(end, start)); + duration = timespec64_sub(end, start); + + kunit_run_case_check_speed(test, test_case, duration); + + return duration; } static void kunit_case_internal_cleanup(struct kunit *test) @@ -424,6 +430,7 @@ struct kunit_try_catch_context { struct kunit *test; struct kunit_suite *suite; struct kunit_case *test_case; + struct timespec64 duration; }; static void kunit_try_run_case(void *data) @@ -440,7 +447,7 @@ static void kunit_try_run_case(void *data) * abort will be called, this thread will exit, and finally the parent * thread will resume control and handle any necessary clean up. */ - kunit_run_case_internal(test, suite, test_case); + ctx->duration = kunit_run_case_internal(test, suite, test_case); } static void kunit_try_run_case_cleanup(void *data) @@ -521,6 +528,7 @@ static void kunit_run_case_catch_errors(struct kunit_suite *suite, { struct kunit_try_catch_context context; struct kunit_try_catch *try_catch; + struct timespec64 *duration = kmalloc(sizeof(struct timespec64), GFP_KERNEL); try_catch = &test->try_catch; @@ -533,6 +541,10 @@ static void kunit_run_case_catch_errors(struct kunit_suite *suite, context.test_case = test_case; kunit_try_catch_run(try_catch, &context); + duration->tv_sec = context.duration.tv_sec; + duration->tv_nsec = context.duration.tv_nsec; + test_case->attr.duration = duration; + /* Now run the cleanup */ kunit_try_catch_init(try_catch, test, @@ -670,6 +682,7 @@ int kunit_run_tests(struct kunit_suite *suite) } kunit_print_attr((void *)test_case, true, KUNIT_LEVEL_CASE); + kunit_free_attr((void *)test_case, true); kunit_print_test_stats(&test, param_stats); @@ -680,6 +693,7 @@ int kunit_run_tests(struct kunit_suite *suite) kunit_update_stats(&suite_stats, test_case->status); kunit_accumulate_stats(&total_stats, param_stats); + } if (suite->suite_exit) @@ -688,6 +702,7 @@ int kunit_run_tests(struct kunit_suite *suite) kunit_print_suite_stats(suite, suite_stats, total_stats); suite_end: kunit_print_suite_end(suite); + kunit_free_attr((void *)suite, false); return 0; } base-commit: 67c9971cd6d309ecbcb87b942e22ffc194d7a376 -- 2.46.0.rc2.264.g509ed76dc8-goog

1 year

2
1
0 0

[PATCH net-next v3 1/3] selftests: net-drv: exercise queue stats when the device is down

by Stanislav Fomichev

Verify that total device stats don't decrease after it has been turned down. Also make sure the device doesn't crash when we access per-queue stats when it's down (in case it tries to access some pointers that are NULL). KTAP version 1 1..5 ok 1 stats.check_pause ok 2 stats.check_fec ok 3 stats.pkt_byte_sum ok 4 stats.qstat_by_ifindex ok 5 stats.check_down # Totals: pass:5 fail:0 xfail:0 xpass:0 skip:0 error:0 v3: - use errno.EOPNOTSUPP (Petr) - move qstat[0] under try (Petr) v2: - KTAP output formatting (Jakub) - defer instead of try/finally (Jakub) - disappearing stats is an error (Jakub) - ksft_ge instead of open coding (Jakub) Signed-off-by: Stanislav Fomichev <sdf(a)fomichev.me> -- Cc: Shuah Khan <shuah(a)kernel.org> Cc: Joe Damato <jdamato(a)fastly.com> Cc: Petr Machata <petrm(a)nvidia.com> Cc: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/drivers/net/stats.py | 25 +++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/stats.py b/tools/testing/selftests/drivers/net/stats.py index 820b8e0a22c6..2fdde8cf0307 100755 --- a/tools/testing/selftests/drivers/net/stats.py +++ b/tools/testing/selftests/drivers/net/stats.py @@ -1,10 +1,12 @@ #!/usr/bin/env python3 # SPDX-License-Identifier: GPL-2.0 +import errno from lib.py import ksft_run, ksft_exit, ksft_pr from lib.py import ksft_ge, ksft_eq, ksft_in, ksft_true, ksft_raises, KsftSkipEx, KsftXfailEx from lib.py import EthtoolFamily, NetdevFamily, RtnlFamily, NlError from lib.py import NetDrvEnv +from lib.py import ip, defer ethnl = EthtoolFamily() netfam = NetdevFamily() @@ -133,9 +135,30 @@ rtnl = RtnlFamily() ksft_eq(cm.exception.nl_msg.extack['bad-attr'], '.ifindex') +def check_down(cfg) -> None: + try: + qstat = netfam.qstats_get({"ifindex": cfg.ifindex}, dump=True)[0] + except NlError as e: + if e.error == errno.EOPNOTSUPP: + raise KsftSkipEx("qstats not supported by the device") + raise + + ip(f"link set dev {cfg.dev['ifname']} down") + defer(ip, f"link set dev {cfg.dev['ifname']} up") + + qstat2 = netfam.qstats_get({"ifindex": cfg.ifindex}, dump=True)[0] + for k, v in qstat.items(): + ksft_ge(qstat2[k], qstat[k], comment=f"{k} went backwards on device down") + + # exercise per-queue API to make sure that "device down" state + # is handled correctly and doesn't crash + netfam.qstats_get({"ifindex": cfg.ifindex, "scope": "queue"}, dump=True) + + def main() -> None: with NetDrvEnv(__file__) as cfg: - ksft_run([check_pause, check_fec, pkt_byte_sum, qstat_by_ifindex], + ksft_run([check_pause, check_fec, pkt_byte_sum, qstat_by_ifindex, + check_down], args=(cfg, )) ksft_exit() -- 2.45.2

1 year

2
3
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[PATCH v2] selftests: openat2: don't print total number of tests and then skip

by Muhammad Usama Anjum

Don't print that 88 sub-tests are going to be executed, but then skip. This is against TAP compliance. Instead check pre-requisites first before printing total number of tests. Old non-tap compliant output: TAP version 13 1..88 ok 2 # SKIP all tests require euid == 0 # Planned tests != run tests (88 != 1) # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:1 error:0 New and correct output: TAP version 13 1..0 # SKIP all tests require euid == 0 Signed-off-by: Muhammad Usama Anjum <usama.anjum(a)collabora.com> --- Changes since v1: - Remove simplifying if condition lines - Update the patch message --- tools/testing/selftests/openat2/resolve_test.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/openat2/resolve_test.c b/tools/testing/selftests/openat2/resolve_test.c index bbafad440893c..85a4c64ee950d 100644 --- a/tools/testing/selftests/openat2/resolve_test.c +++ b/tools/testing/selftests/openat2/resolve_test.c @@ -508,12 +508,13 @@ void test_openat2_opath_tests(void) int main(int argc, char **argv) { ksft_print_header(); - ksft_set_plan(NUM_TESTS); /* NOTE: We should be checking for CAP_SYS_ADMIN here... */ if (geteuid() != 0) ksft_exit_skip("all tests require euid == 0\n"); + ksft_set_plan(NUM_TESTS); + test_openat2_opath_tests(); if (ksft_get_fail_cnt() + ksft_get_error_cnt() > 0) -- 2.39.2

1 year

3
8
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[PATCH 0/3] iommufd: Add selftest coverage for reserved IOVAs

by Nicolin Chen

This adds a small series to cover the reserved-IOVA change: https://lore.kernel.org/all/20240802053458.2754673-1-nicolinc@nvidia.com/ PATCH-1 is an optional cleanup. PATCH-2 is an essential infrastructure for PATCH-3 to verify the loopback for IOMMU_RESV_SW_MSI. You can find this series applied on the other two earlier patches here: https://github.com/nicolinc/iommufd/commits/iommufd_selftest_sw_msi/ Thanks Nicolin Nicolin Chen (2): iommufd: Reorder include files iommufd/selftest: Add coverage for reserved IOVAs Robin Murphy (1): iommu/dma: Support MSIs through nested domains drivers/iommu/dma-iommu.c | 18 +++- drivers/iommu/iommufd/device.c | 4 +- drivers/iommu/iommufd/fault.c | 4 +- drivers/iommu/iommufd/io_pagetable.c | 8 +- drivers/iommu/iommufd/io_pagetable.h | 2 +- drivers/iommu/iommufd/ioas.c | 2 +- drivers/iommu/iommufd/iommufd_private.h | 9 +- drivers/iommu/iommufd/iommufd_test.h | 6 +- drivers/iommu/iommufd/iova_bitmap.c | 2 +- drivers/iommu/iommufd/main.c | 8 +- drivers/iommu/iommufd/pages.c | 10 +-- drivers/iommu/iommufd/selftest.c | 86 ++++++++++++++++++- include/linux/iommu.h | 4 + include/linux/iommufd.h | 4 +- include/uapi/linux/iommufd.h | 2 +- tools/testing/selftests/iommu/iommufd_utils.h | 9 ++ 16 files changed, 144 insertions(+), 34 deletions(-) -- 2.43.0

1 year

1
4
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[PATCH v1] kselftest/devices/probe: fixed SintaxWarning for Python 3

by Alessandro Zanni

Inserted raw strings because Python3 interpretes string literals as Unicode strings, so '\d' is considered an invalid escaped sequence but this is not the case. This fix avoids the "SyntaxWarning: invalid escape sequence '\d'" warning for Python versions greater than 3.6. Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- Notes: v1: inserted raw strings to avoid SyntaxWarning in Python3 .../selftests/devices/probe/test_discoverable_devices.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/devices/probe/test_discoverable_devices.py b/tools/testing/selftests/devices/probe/test_discoverable_devices.py index d94a74b8a054..d7a2bb91c807 100755 --- a/tools/testing/selftests/devices/probe/test_discoverable_devices.py +++ b/tools/testing/selftests/devices/probe/test_discoverable_devices.py @@ -45,7 +45,7 @@ def find_pci_controller_dirs(): def find_usb_controller_dirs(): - usb_controller_sysfs_dir = "usb[\d]+" + usb_controller_sysfs_dir = r"usb[\d]+" dir_regex = re.compile(usb_controller_sysfs_dir) for d in os.scandir(sysfs_usb_devices): @@ -91,7 +91,7 @@ def get_acpi_uid(sysfs_dev_dir): def get_usb_version(sysfs_dev_dir): - re_usb_version = re.compile("PRODUCT=.*/(\d)/.*") + re_usb_version = re.compile(r"PRODUCT=.*/(\d)/.*") with open(os.path.join(sysfs_dev_dir, "uevent")) as f: return int(re_usb_version.search(f.read()).group(1)) -- 2.43.0

1 year

2
1
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[PATCH 0/2] selftests/nolibc: run-user improvements

by Thomas Weißschuh

A small bugfix for "run-user XARCH=ppc64le" and run-user support for run-tests.sh. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- Thomas Weißschuh (2): selftests/nolibc: introduce QEMU_ARCH_USER selftests/nolibc: run-tests.sh: enable testing via qemu-user tools/testing/selftests/nolibc/Makefile | 5 ++++- tools/testing/selftests/nolibc/run-tests.sh | 22 +++++++++++++++++++--- 2 files changed, 23 insertions(+), 4 deletions(-) --- base-commit: ba335752620565c25c3028fff9496bb8ef373602 change-id: 20770915-nolibc-run-user-845375a3ec4f Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

1 year

5
8
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[PATCH 0/7] Extend pmu_counters_test to AMD CPUs

by Colton Lewis

Extend pmu_counters_test to AMD CPUs. As the AMD PMU is quite different from Intel with different events and feature sets, this series introduces a new code path to test it, specifically focusing on the core counters including the PerfCtrExtCore and PerfMonV2 features. Northbridge counters and cache counters exist, but are not as important and can be deferred to a later series. The first patch is a bug fix that could be submitted separately. The series has been tested on both Intel and AMD machines, but I have not found an AMD machine old enough to lack PerfCtrExtCore. I have made efforts that no part of the code has any dependency on its presence. I am aware of similar work in this direction done by Jinrong Liang [1]. He told me he is not working on it currently and I am not intruding by making my own submission. [1] https://lore.kernel.org/kvm/20231121115457.76269-1-cloudliang@tencent.com/ Colton Lewis (6): KVM: x86: selftests: Fix typos in macro variable use KVM: x86: selftests: Define AMD PMU CPUID leaves KVM: x86: selftests: Set up AMD VM in pmu_counters_test KVM: x86: selftests: Test read/write core counters KVM: x86: selftests: Test core events KVM: x86: selftests: Test PerfMonV2 .../selftests/kvm/include/x86_64/processor.h | 7 + .../selftests/kvm/x86_64/pmu_counters_test.c | 267 ++++++++++++++++-- 2 files changed, 249 insertions(+), 25 deletions(-) -- 2.46.0.rc2.264.g509ed76dc8-goog

1 year

1
6
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[PATCH] selftests: tpm2: redirect python unittest logs to stdout

by Muhammad Usama Anjum

The python unittest module writes all its output to stderr, even when the run is clean. Redirect its output logs to stdout. Cc: Jarkko Sakkinen <jarkko(a)kernel.org> Signed-off-by: Muhammad Usama Anjum <usama.anjum(a)collabora.com> --- tools/testing/selftests/tpm2/test_async.sh | 2 +- tools/testing/selftests/tpm2/test_smoke.sh | 2 +- tools/testing/selftests/tpm2/test_space.sh | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/tpm2/test_async.sh b/tools/testing/selftests/tpm2/test_async.sh index 43bf5bd772fd4..cf5a9c826097b 100755 --- a/tools/testing/selftests/tpm2/test_async.sh +++ b/tools/testing/selftests/tpm2/test_async.sh @@ -7,4 +7,4 @@ ksft_skip=4 [ -e /dev/tpm0 ] || exit $ksft_skip [ -e /dev/tpmrm0 ] || exit $ksft_skip -python3 -m unittest -v tpm2_tests.AsyncTest +python3 -m unittest -v tpm2_tests.AsyncTest 2>&1 diff --git a/tools/testing/selftests/tpm2/test_smoke.sh b/tools/testing/selftests/tpm2/test_smoke.sh index 58af963e5b55a..20fa70f970a9a 100755 --- a/tools/testing/selftests/tpm2/test_smoke.sh +++ b/tools/testing/selftests/tpm2/test_smoke.sh @@ -6,4 +6,4 @@ ksft_skip=4 [ -e /dev/tpm0 ] || exit $ksft_skip -python3 -m unittest -v tpm2_tests.SmokeTest +python3 -m unittest -v tpm2_tests.SmokeTest 2>&1 diff --git a/tools/testing/selftests/tpm2/test_space.sh b/tools/testing/selftests/tpm2/test_space.sh index 04c47b13fe8ac..93894cbc89a80 100755 --- a/tools/testing/selftests/tpm2/test_space.sh +++ b/tools/testing/selftests/tpm2/test_space.sh @@ -6,4 +6,4 @@ ksft_skip=4 [ -e /dev/tpmrm0 ] || exit $ksft_skip -python3 -m unittest -v tpm2_tests.SpaceTest +python3 -m unittest -v tpm2_tests.SpaceTest 2>&1 -- 2.39.2

1 year

4
6
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[PATCH RFC] kselftest: devices: Add test to detect missing devices

by Nícolas F. R. A. Prado

Introduce a new test to identify regressions causing devices to go missing on the system. For each bus and class on the system the test checks the number of devices present against a reference file, which needs to have been generated by the program at a previous point on a known-good kernel, and if there are missing devices they are reported. Signed-off-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com> --- Hi, Key points about this test: * Goal: Identify regressions causing devices to go missing on the system * Focus: * Ease of maintenance: the reference file is generated programatically * Minimum of false-positives: the script makes as few assumptions as possible about the stability of device identifiers to ensure renames/refactors don't trigger false-positives * How it works: For each bus and class on the system the test checks the number of devices present against a reference file, which needs to have been generated by the program at a previous point on a known-good kernel, and if there are missing devices they are reported. * Comparison to other tests: It might be possible(*) to replace the discoverable devices test [1] with this. The benefits of this test is that it's easier to setup and maintain and has wider coverage of devices. Additional detail: * Having more devices on the running system than the reference does not cause a failure, but a warning is printed in that case to suggest that the reference be updated. * Missing devices are detected per bus/class based on the number of devices. When the test fails, the known metadata for each of the expected and detected devices is printed and some simple similitarity comparison is done to suggest the devices that are the most likely to be missing. * The proposed place to store the generated reference files is the 'platform-test-parameters' repository in KernelCI [2]. Example output: This is an example of a failing test case when one of the two devices in the nvmem bus went missing: # Missing devices for subsystem 'nvmem': 1 (Expected 2, found 1) # ================= # Devices expected: # # uevent: # OF_NAME=efuse # OF_FULLNAME=/soc/efuse@11c10000 # OF_COMPATIBLE_0=mediatek,mt8195-efuse # OF_COMPATIBLE_1=mediatek,efuse # OF_COMPATIBLE_N=2 # # uevent: # OF_NAME=flash # OF_FULLNAME=/soc/spi@1132c000/flash@0 # OF_COMPATIBLE_0=jedec,spi-nor # OF_COMPATIBLE_N=1 # # ----------------- # Devices found: # # uevent: # OF_NAME=efuse # OF_FULLNAME=/soc/efuse@11c10000 # OF_COMPATIBLE_0=mediatek,mt8195-efuse # OF_COMPATIBLE_1=mediatek,efuse # OF_COMPATIBLE_N=2 # # ----------------- # Devices missing (best guess): # # uevent: # OF_NAME=flash # OF_FULLNAME=/soc/spi@1132c000/flash@0 # OF_COMPATIBLE_0=jedec,spi-nor # OF_COMPATIBLE_N=1 # # ================= not ok 19 bus.nvmem Example of how the data for these devices is encoded in the reference file: bus: ... nvmem: count: 2 devices: - info: uevent: 'OF_NAME=efuse OF_FULLNAME=/soc/efuse@11c10000 OF_COMPATIBLE_0=mediatek,mt8195-efuse OF_COMPATIBLE_1=mediatek,efuse OF_COMPATIBLE_N=2 ' - info: uevent: 'OF_NAME=flash OF_FULLNAME=/soc/spi@1132c000/flash@0 OF_COMPATIBLE_0=jedec,spi-nor OF_COMPATIBLE_N=1 ' (Full reference file: http://0x0.st/Xp60.yaml;) Caveat: Relying only on the count of devices in a subsystem makes the test susceptible to false-negatives eg. if a device goes missing and another in the same subsystem is added the count will be the same so this regression won't be reported. In order to avoid this we may include properties that must match individual devices, but we must be very careful (and it's why I haven't done it) since matching against properties that aren't guaranteed to be stable will introduce false-positives (ie. detecting false regressions) due to eventual renames. Some things to improve in the near future / gather feedback on: * (*): Currently this test only checks for the existence of devices. We could extend it to also encode into the reference which devices are bound to drivers to be able to completely replace the discoverable devices probe kselftest [1]. * Expanding identifying properties: Currently the properties that are stored (when present) in the reference for each device to be used for identification in the result output are uevent, device/uevent, firmware_node/uevent and name. Suggestions of others properties to add are welcome. * Adding more filtering to reduce noise: * Ignoring buses/classes: Currently the devlink class is ignored by the test since it seems like a kernel internal detail that userspace doesn't actually care about. We should add others that are similar. * Ignoring non-devices: There can be entries in /sys/class/ that aren't devices. For now we're filtering down to only symlinks, but there might be a better way. * As mentioned in the caveat section above we may want to add actual matching of devices based on properties to avoid false-negatives if we identify suitable properties. * It would be nice to have an option in the program to compare a newer reference to an older one to make it easier for the user to see the differences and decide if the new reference is ok. * Since the reference file is not supposed to be manually edited, JSON might be a better choice than YAML since it is included in the python standard library. Let me know your thoughts. Thanks, Nícolas [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/too… [2] https://github.com/kernelci/platform-test-parameters --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/devices/exist/Makefile | 3 + tools/testing/selftests/devices/exist/exist.py | 268 +++++++++++++++++++++++++ 3 files changed, 272 insertions(+) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index bc8fe9e8f7f2..9c49b5ec5bef 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -14,6 +14,7 @@ TARGETS += cpufreq TARGETS += cpu-hotplug TARGETS += damon TARGETS += devices/error_logs +TARGETS += devices/exist TARGETS += devices/probe TARGETS += dmabuf-heaps TARGETS += drivers/dma-buf diff --git a/tools/testing/selftests/devices/exist/Makefile b/tools/testing/selftests/devices/exist/Makefile new file mode 100644 index 000000000000..3075cac32092 --- /dev/null +++ b/tools/testing/selftests/devices/exist/Makefile @@ -0,0 +1,3 @@ +TEST_PROGS := exist.py + +include ../../lib.mk diff --git a/tools/testing/selftests/devices/exist/exist.py b/tools/testing/selftests/devices/exist/exist.py new file mode 100755 index 000000000000..8241b2fabc8e --- /dev/null +++ b/tools/testing/selftests/devices/exist/exist.py @@ -0,0 +1,268 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2024 Collabora Ltd + +# * Goal: Identify regressions causing devices to go missing on the system +# * Focus: +# * Ease of maintenance: the reference file is generated programatically +# * Minimum of false-positives: the script makes as few assumptions as +# possible about the stability of device identifiers to ensure +# renames/refactors don't trigger false-positives +# * How it works: For each bus and class on the system the test checks the +# number of devices present against a reference file, which needs to have been +# generated by the program at a previous point on a known-good kernel, and if +# there are missing devices they are reported. + +import os +import sys +import argparse + +import yaml + +# Allow ksft module to be imported from different directory +this_dir = os.path.dirname(os.path.realpath(__file__)) +sys.path.append(os.path.join(this_dir, "../../kselftest/")) + +import ksft + + +def generate_devs_obj(): + obj = {} + + device_sources = [ + { + "base_dir": "/sys/class", + "add_path": "", + "key_name": "class", + "ignored": ["devlink"], + }, + { + "base_dir": "/sys/bus", + "add_path": "devices", + "key_name": "bus", + "ignored": [], + }, + ] + + properties = sorted(["uevent", "device/uevent", "firmware_node/uevent", "name"]) + + for source in device_sources: + source_subsystems = {} + for subsystem in sorted(os.listdir(source["base_dir"])): + if subsystem in source["ignored"]: + continue + + devs_path = os.path.join(source["base_dir"], subsystem, source["add_path"]) + dev_dirs = [dev for dev in os.scandir(devs_path) if dev.is_symlink()] + devs_data = [] + for dev_dir in dev_dirs: + dev_path = os.path.join(devs_path, dev_dir) + dev_data = {"info": {}} + for prop in properties: + if os.path.isfile(os.path.join(dev_path, prop)): + with open(os.path.join(dev_path, prop)) as f: + dev_data["info"][prop] = f.read() + devs_data.append(dev_data) + if len(dev_dirs): + source_subsystems[subsystem] = { + "count": len(dev_dirs), + "devices": devs_data, + } + obj[source["key_name"]] = source_subsystems + + return obj + + +def commented(s): + return s.replace("\n", "\n# ") + + +def indented(s, n): + return " " * n + s.replace("\n", "\n" + " " * n) + + +def stripped(s): + return s.strip("\n") + + +def devices_difference(dev1, dev2): + difference = 0 + + for prop in dev1["info"].keys(): + for l1, l2 in zip( + dev1["info"].get(prop, "").split("\n"), + dev2["info"].get(prop, "").split("\n"), + ): + if l1 != l2: + difference += 1 + return difference + + +def guess_missing_devices(cur_devs_subsystem, ref_devs_subsystem): + # Detect what devices on the current system are the most similar to devices + # on the reference one by one until the leftovers are the most dissimilar + # devices and therefore most likely the missing ones. + found_count = cur_devs_subsystem["count"] + expected_count = ref_devs_subsystem["count"] + missing_count = found_count - expected_count + + diffs = [] + for cur_d in cur_devs_subsystem["devices"]: + for ref_d in ref_devs_subsystem["devices"]: + diffs.append((devices_difference(cur_d, ref_d), cur_d, ref_d)) + + diffs.sort(key=lambda x: x[0]) + + assigned_ref_devs = [] + assigned_cur_devs = [] + for diff in diffs: + if len(assigned_ref_devs) >= expected_count - missing_count: + break + if diff[1] in assigned_cur_devs or diff[2] in assigned_ref_devs: + continue + assigned_cur_devs.append(diff[1]) + assigned_ref_devs.append(diff[2]) + + missing_devices = [] + for d in ref_devs_subsystem["devices"]: + if d not in assigned_ref_devs: + missing_devices.append(d) + + return missing_devices + + +def dump_devices_info(cur_devs_subsystem, ref_devs_subsystem): + def dump_device_info(dev): + for name, val in dev["info"].items(): + ksft.print_msg(indented(name + ":", 2)) + val = stripped(val) + if val: + ksft.print_msg(commented(indented(val, 4))) + ksft.print_msg("") + + ksft.print_msg("=================") + ksft.print_msg("Devices expected:") + ksft.print_msg("") + for d in ref_devs_subsystem["devices"]: + dump_device_info(d) + ksft.print_msg("-----------------") + ksft.print_msg("Devices found:") + ksft.print_msg("") + for d in cur_devs_subsystem["devices"]: + dump_device_info(d) + ksft.print_msg("-----------------") + ksft.print_msg("Devices missing (best guess):") + ksft.print_msg("") + missing_devices = guess_missing_devices(cur_devs_subsystem, ref_devs_subsystem) + for d in missing_devices: + dump_device_info(d) + ksft.print_msg("=================") + + +def run_test(ref_filename): + ksft.print_msg(f"Using reference file: {ref_filename}") + + with open(ref_filename) as f: + ref_devs_obj = yaml.safe_load(f) + + num_tests = 0 + for dev_source in ref_devs_obj.values(): + num_tests += len(dev_source) + ksft.set_plan(num_tests) + + cur_devs_obj = generate_devs_obj() + + reference_outdated = False + + for source, ref_devs_source_obj in ref_devs_obj.items(): + for subsystem, ref_devs_subsystem_obj in ref_devs_source_obj.items(): + test_name = f"{source}.{subsystem}" + if not ( + cur_devs_obj.get(source) and cur_devs_obj.get(source).get(subsystem) + ): + ksft.print_msg(f"Device subsystem '{subsystem}' missing") + ksft.test_result_fail(test_name) + continue + cur_devs_subsystem_obj = cur_devs_obj[source][subsystem] + + found_count = cur_devs_subsystem_obj["count"] + expected_count = ref_devs_subsystem_obj["count"] + if found_count < expected_count: + ksft.print_msg( + f"Missing devices for subsystem '{subsystem}': {expected_count - found_count} (Expected {expected_count}, found {found_count})" + ) + dump_devices_info(cur_devs_subsystem_obj, ref_devs_subsystem_obj) + ksft.test_result_fail(test_name) + else: + ksft.test_result_pass(test_name) + if found_count > expected_count: + reference_outdated = True + + if len(cur_devs_obj[source]) > len(ref_devs_source_obj): + reference_outdated = True + + if reference_outdated: + ksft.print_msg( + "Warning: The current system contains more devices and/or subsystems than the reference. Updating the reference is recommended." + ) + + +def get_possible_ref_filenames(): + filenames = [] + + dt_board_compatible_file = "/proc/device-tree/compatible" + if os.path.exists(dt_board_compatible_file): + with open(dt_board_compatible_file) as f: + for line in f: + compatibles = [compat for compat in line.split("\0") if compat] + filenames.extend(compatibles) + else: + dmi_id_dir = "/sys/devices/virtual/dmi/id" + vendor_dmi_file = os.path.join(dmi_id_dir, "sys_vendor") + product_dmi_file = os.path.join(dmi_id_dir, "product_name") + + with open(vendor_dmi_file) as f: + vendor = f.read().replace("\n", "") + with open(product_dmi_file) as f: + product = f.read().replace("\n", "") + + filenames = [vendor + "," + product] + + return filenames + + +def get_ref_filename(ref_dir): + chosen_ref_filename = "" + full_ref_paths = [os.path.join(ref_dir, f + ".yaml") for f in get_possible_ref_filenames()] + for path in full_ref_paths: + if os.path.exists(path): + chosen_ref_filename = path + break + + if not chosen_ref_filename: + tried_paths = ",".join(["'" + p + "'" for p in full_ref_paths]) + ksft.print_msg(f"No matching reference file found (tried {tried_paths})") + ksft.exit_fail() + + return chosen_ref_filename + + +parser = argparse.ArgumentParser() +parser.add_argument( + "--reference-dir", default=".", help="Directory containing the reference files" +) +parser.add_argument("--generate-reference", action="store_true", help="Generate a reference file with the devices on the running system") +args = parser.parse_args() + +if args.generate_reference: + print(f"# Kernel version: {os.uname().release}") + print(yaml.dump(generate_devs_obj())) + sys.exit(0) + +ksft.print_header() + +ref_filename = get_ref_filename(args.reference_dir) + +run_test(ref_filename) + +ksft.finished() --- base-commit: 73399b58e5e5a1b28a04baf42e321cfcfc663c2f change-id: 20240724-kselftest-dev-exist-bb1bcf884654 Best regards, -- Nícolas F. R. A. Prado <nfraprado(a)collabora.com>

1 year

3
7
0 0

Questions regarding "act_mirred: use the backlog for nested calls to mirred ingress"

by Khannanov Lenar

Hello Davide, In the following commit: commit ca22da2fbd693b54dc8e3b7b54ccc9f7e9ba3640 Author: Davide Caratti <dcaratti(a)redhat.com> Date: Fri Jan 20 18:01:40 2023 +0100 act_mirred: use the backlog for nested calls to mirred ingress you added the mirred_egress_to_ingress_tcp_test kselftest that, I noticed, hangs with "Ncat: TIMEOUT." if openvswitch module is loaded. Is this the right behaviour or was such configuration not intended? Regards, Lenar Khannanov

1 year

1
0
0 0

[PATCH net-next 1/6] net: netconsole: selftests: Create a new netconsole selftest

by Breno Leitao

Adds a selftest that creates two virtual interfaces, assigns one to a new namespace, and assigns IP addresses to both. It listens on the destination interface using netcat and configures a dynamic target on netconsole, pointing to the destination IP address. The test then checks if the message was received properly on the destination interface. Signed-off-by: Breno Leitao <leitao(a)debian.org> --- MAINTAINERS | 1 + .../net/netconsole/basic_integration_test.sh | 153 ++++++++++++++++++ 2 files changed, 154 insertions(+) create mode 100755 tools/testing/selftests/net/netconsole/basic_integration_test.sh diff --git a/MAINTAINERS b/MAINTAINERS index c0a3d9e93689..59207365c9f5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15768,6 +15768,7 @@ M: Breno Leitao <leitao(a)debian.org> S: Maintained F: Documentation/networking/netconsole.rst F: drivers/net/netconsole.c +F: tools/testing/selftests/net/netconsole/ NETDEVSIM M: Jakub Kicinski <kuba(a)kernel.org> diff --git a/tools/testing/selftests/net/netconsole/basic_integration_test.sh b/tools/testing/selftests/net/netconsole/basic_integration_test.sh new file mode 100755 index 000000000000..fbabbc633451 --- /dev/null +++ b/tools/testing/selftests/net/netconsole/basic_integration_test.sh @@ -0,0 +1,153 @@ +#!/usr/bin/env bash +# SPDX-License-Identifier: GPL-2.0 + +# This test creates two virtual interfaces, assigns one of them (the "destination +# interface") to a new namespace, and assigns IP addresses to both interfaces. +# +# It listens on the destination interface using netcat (nc) and configures a +# dynamic target on netconsole, pointing to the destination IP address. +# +# Finally, it checks whether the message was received properly on the +# destination interface. Note that this test may pollute the kernel log buffer +# (dmesg) and relies on dynamic configuration and namespaces being configured." +# +# Author: Breno Leitao <leitao(a)debian.org> + +SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") + +# Simple script to test dynamic targets in netconsole +SRCIF="veth0" +SRCIP=192.168.1.1 + +DSTIF="veth1" +DSTIP=192.168.1.2 + +PORT="6666" +MSG="netconsole selftest" +TARGET=$(mktemp -u netcons_XXXXX) +NETCONS_CONFIGFS="/sys/kernel/config/netconsole" +FULLPATH="${NETCONS_CONFIGFS}"/"${TARGET}" +# This will be have some tmp values appened to it in set_network() +NAMESPACE="netconsns" + +# Used to create and delete namespaces +source "${SCRIPTDIR}"/../lib.sh + +function set_network() { + # this is coming from lib.sh + setup_ns "${NAMESPACE}" + NAMESPACE=${NS_LIST[0]} + ip link add "${SRCIF}" type veth peer name "${DSTIF}" + + # "${DSTIF}" + ip link set "${DSTIF}" netns "${NAMESPACE}" + ip netns exec "${NAMESPACE}" ip addr add "${DSTIP}"/24 dev "${DSTIF}" + ip netns exec "${NAMESPACE}" ip link set "${DSTIF}" up + + # later, configure "${SRCIF}" + ip addr add "${SRCIP}"/24 dev "${SRCIF}" + ip link set "${SRCIF}" up +} + +function create_dynamic_target() { + DSTMAC=$(ip netns exec "${NAMESPACE}" ip link show "${DSTIF}" | awk '/ether/ {print $2}') + + # Create a dynamic target + mkdir ${FULLPATH} + + echo ${DSTIP} > ${FULLPATH}/remote_ip + echo ${SRCIP} > ${FULLPATH}/local_ip + echo ${DSTMAC} > ${FULLPATH}/remote_mac + echo "${SRCIF}" > ${FULLPATH}/dev_name + + echo 1 > ${FULLPATH}/enabled +} + +function cleanup() { + echo 0 > "${FULLPATH}"/enabled + rmdir "${FULLPATH}" + # This will delete DSTIF also + ip link del "${SRCIF}" + # this is coming from lib.sh + cleanup_all_ns +} + +function listen_port() { + OUTPUT=${1} + echo "Saving content in ${OUTPUT}" + timeout 2 ip netns exec "${NAMESPACE}" nc -u -l "${PORT}" | sed '/^$/q' > ${OUTPUT} +} + +function validate_result() { + TMPFILENAME=/tmp/"${TARGET}" + + # sleep until the file isc reated + sleep 1 + # Check if the file exists + if [ ! -f "$TMPFILENAME" ]; then + echo "FAIL: File was not generate." >&2 + return ${ksft_fail} + fi + + if ! grep -q "${MSG}" "${TMPFILENAME}"; then + echo "FAIL: ${MSG} not found in ${TMPFILENAME}" >&2 + cat ${TMPFILENAME} >&2 + return ${ksft_fail} + fi + + rm ${TMPFILENAME} + return ${ksft_pass} +} + +function check_for_dependencies() { + if [ "$(id -u)" -ne 0 ]; then + echo "This script must be run as root" >&2 + exit 1 + fi + + if ! which nc > /dev/null ; then + echo "SKIP: nc(1) is not available" >&2 + exit ${ksft_skip} + fi + + if ! which ip > /dev/null ; then + echo "SKIP: ip(1) is not available" >&2 + exit ${ksft_skip} + fi + + if [ ! -d "${NETCONS_CONFIGFS}" ]; then + echo "SKIP: directory ${NETCONS_CONFIGFS} does not exist. Check if NETCONSOLE_DYNAMIC is enabled" >&2 + exit ${ksft_skip} + fi + + if ip link show veth0 2> /dev/null; then + echo "SKIP: interface veth0 exists in the system. Not overwriting it." + exit ${ksft_skip} + fi +} + +# ========== # +# Start here # +# ========== # + +# Check for basic system dependency and exit if not found +check_for_dependencies +# Create one namespace and two interfaces +set_network +# Create a dynamic target for netconsole +create_dynamic_target +# Listed for netconsole port inside the namespace and destination interface +listen_port /tmp/"${TARGET}" & +# Wait for nc to start and listen to the port. +sleep 1 + +# Send the message +echo "${MSG}: ${TARGET}" > /dev/kmsg + +# Make sure the message was received in the dst part +validate_result +ret=$? +# Remove the namespace, interfaces and netconsole target +cleanup + +exit ${ret} -- 2.43.0

1 year

2
2
0 0

[PATCH net 0/7] mptcp: fix endpoints with 'signal' and 'subflow' flags

by Matthieu Baerts (NGI0)

When looking at improving the user experience around the MPTCP endpoints setup, I noticed that setting an endpoint with both the 'signal' and the 'subflow' flags -- as it has been done in the past by users according to bug reports we got -- was resulting on only announcing the endpoint, but not using it to create subflows: the 'subflow' flag was then ignored. My initial thought was to modify IPRoute2 to warn the user when the two flags were set, but it doesn't sound normal to ignore one of them. I then looked at modifying the kernel not to allow having the two flags set, but when discussing about that with Mat, we thought it was maybe not ideal to do that, as there might be use-cases, we might break some configs. Then I saw it was working before v5.17. So instead, I fixed the support on the kernel side (patch 5) using Paolo's suggestion. This also includes a fix on the options side (patch 1: for v5.11+), an explicit deny of some options combinations (patch 2: for v5.18+), and some refactoring (patches 3 and 4) to ease the inclusion of the patch 5. While at it, I added a new selftest (patch 7) to validate this case -- including a modification of the chk_add_nr helper to inverse the sides were the counters are checked (patch 6) -- and allowed ADD_ADDR echo just after the MP_JOIN 3WHS. The selftests modification have the same Fixes tag as the previous commit, but no 'Cc: Stable': if the backport can work, that's good -- but it still need to be verified by running the selftests -- if not, no need to worry, many CIs will use the selftests from the last stable version to validate previous stable releases. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Matthieu Baerts (NGI0) (7): mptcp: fully established after ADD_ADDR echo on MPJ mptcp: pm: deny endp with signal + subflow + port mptcp: pm: reduce indentation blocks mptcp: pm: don't try to create sf if alloc failed mptcp: pm: do not ignore 'subflow' if 'signal' flag is also set selftests: mptcp: join: ability to invert ADD_ADDR check selftests: mptcp: join: test both signal & subflow net/mptcp/options.c | 3 +- net/mptcp/pm_netlink.c | 47 +++++++++++++-------- tools/testing/selftests/net/mptcp/mptcp_join.sh | 55 ++++++++++++++++++------- 3 files changed, 73 insertions(+), 32 deletions(-) --- base-commit: 0bf50cead4c4710d9f704778c32ab8af47ddf070 change-id: 20240731-upstream-net-20240731-mptcp-endp-subflow-signal-181d640cf5e8 Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

1 year

2
8
0 0

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